A member of an Iraqi Shiite militant group called Imam Ali Brigades stands guard in Tikrit, 130 kilometers (80 miles) north of Baghdad, Iraq, Tuesday, March 24, 2015. (AP Photo/Khalid Mohammed)

Shiite militiamen chant slogans as they take the body of an Islamic State fighter for burial after overnight clashes in Tikrit, 130 kilometers (80 miles) north of Baghdad, Iraq, Tuesday, March 24, 2015. (AP Photo/Khalid Mohammed)

CF-18 Hornets fly in formation on their the departure for Operation IMPACT, in Cold Lake, Alberta on Tuesday October 21, 2014. The Canadian CF-18 Hornets are making their way to Kuwait, to join the fight against the Islamic State of Iraq and Syria. THE CANADIAN PRESS/Jason Franson

A group that claims to represent ISIS -- called Islamic State Hacking Division -- posted the list online as a "hit list" for lone-wolf terrorists.

Military personnel guide a CF-18 Hornet into position at the CFB Cold Lake, in Cold Lake, Alberta on Tuesday October 21, 2014. The Canadian CF-18 Hornets are making their way to Kuwait, to join the fight against the Islamic State of Iraq and Syria. THE CANADIAN PRESS/Jason Franson

A Canadian CF-18 gets the go-ahead for takeoff at dusk at the military base in Dohar, Qatar on December 3, 1990. Defence Minister Rob Nicholson says an advance military team will leave Trenton, Ont., for Kuwait next week as Canada gears up to join the fight against Islamic State militants in Iraq. THE CANADIAN PRESS/Paul Chiasson

CF-18 Hornets fly in formation on their the departure for Operation IMPACT, in Cold Lake, Alberta on Tuesday October 21, 2014. The Canadian CF-18 Hornets are making their way to Kuwait, to join the fight against the Islamic State of Iraq and Syria. THE CANADIAN PRESS/Jason Franson

In this undated photo made available Saturday, March 14, 2015, by the Kurdistan Region Security Council (KRSC), a piece of debris that the Kurdistan Region Security Council said is a gas canister lies at the site of a bomb attack on a road between Mosul, Iraq, and the Syrian border in northern Iraq. Kurdish authorities in Iraq said Saturday they have evidence that the Islamic State group used chlorine gas as a chemical weapon against peshmerga fighters, the latest alleged atrocity carried out by the extremist organization now under attack in Tikrit. (AP Photo/Kurdistan Region Security Council)

In this undated photo made avaialble Saturday, March 14, 2015, by the Kurdistan Region Security Council (KRSC), Kurdish soldiers survey the site of a bomb attack on a road between Mosul, Iraq, and the Syrian border in northern Iraq. Kurdish authorities in Iraq said Saturday they have evidence that the Islamic State group used chlorine gas as a chemical weapon against peshmerga fighters, the latest alleged atrocity carried out by the extremist organization now under attack in Tikrit. (AP Photo/Kurdistan Region Security Council)

In this undated photo made available Saturday, March 14, 2015, by the Kurdistan Region Security Council (KRSC), Kurdish soldiers walk around the site of a bomb attack on a road between Mosul, Iraq, and the Syrian border in northern Iraq. Kurdish authorities in Iraq said Saturday they have evidence that the Islamic State group used chlorine gas as a chemical weapon against peshmerga fighters, the latest alleged atrocity carried out by the extremist organization now under attack in Tikrit. (AP Photo/Kurdistan Region Security Council)

FILE - In this Wednesday, Feb. 25, 2015 file photo, gunsmith Bahktiyar Sadr-Aldeen holds a weapon at his shop, in Irbil, northern Iraq. Sadr-Aldeen, an Iraqi Kurd, has seen his business shoot up by 50 percent since last June, when the Islamic State took over the Iraqi city of Mosul. The Kurdish fighting force known as the pershmerga has been at war against the Sunni extremists ever since, keeping Aldeen busy. Photos of Aldeen as a child working at his father's repair shop hang on the wall. (AP Photo/Bram Janssen, File)

A Syrian Kurdish militia member of YPG patrols near a Turkish army tank as Turks work to build a new Ottoman tomb in the background in Esme village in Aleppo province, Syria, Sunday, Feb. 22, 2015. Turkey launched an overnight military operation into neighboring Syria to evacuate troops guarding an Ottoman tomb and to move the crypt to a new location, Turkish Prime Minister Ahmet Davutoglu said Sunday. Davutoglu said they plan to build a new Ottoman tomb in Esme village, close to Turkey-Syria border. (AP Photo/Mursel Coban, Depo Photos)

A video purporting to show a mass beheading of Coptic Christian hostages was released Sunday, February 15, 2015 by militants affiliated to the ISIS terrorists.

Video provided by: Al Hayat

In this undated image provided by Jordan Matson, British citizen Konstandinos Erik Scurfield poses for a group photo with Kurdish fighters and foreign volunteers fighting the Islamic State group in Sinjar, Iraq. Scurfield was shot dead on Monday, March 2, 2015 in Syria, a Kurdish commander said Wednesday. At least one other foreign fighter, Australian Ase Johnson, is known to have been killed fighting alongside the Kurds. (AP Photo courtesy Jordan Matson)

Survivors of Islamic State Video Speak Out

A video purporting to show a mass beheading of Coptic Christian hostages was released Sunday, February 15, 2015 by militants affiliated to the ISIS terrorists.

Video provided by: Al Hayat

A video purporting to show a mass beheading of Coptic Christian hostages was released Sunday, February 15, 2015 by militants affiliated to the ISIS terrorists.

Video provided by: Al Hayat

FILE - This Monday. Feb. 16, 2015 file video image from aerial footage released by the Egyptian Defense Ministry, shows an airstrike on Islamic State group positions, in Libya. Egypt is making an ambitious bid to place itself at the center of the fight against extremism across the Middle East. Beyond fighting militants in its own Sinai Peninsula, it is trying to organize an international coalition against the Islamic State in Libya and helping Saudi Arabia defend its borders. (AP Photo/Egyptian Defense Ministry, File)

FILE - In this Monday, Nov. 24, 2014 file photo, Iraqi army soldiers deploy in front of a court run by the Islamic State group after a military operation to regain control of the town of Sadiyah in Diyala province, 60 miles (95 kilometers) north of Baghdad, Iraq. Questions persist about whether the struggling Iraqi military will be ready for the operation to retake Mosul, the country's second largest city, from Islamic State militants in just a few months. A U.S. Central Command official provided some details of the battle plan saying the coordinated military mission to retake Mosul will likely begin in April or May 2015. (AP Photo, File)

This undated image posted by the Raqqa Media Center, a Syrian opposition group, on Monday, June 30, 2014, which has been verified and is consistent with other AP reporting, shows fighters from the al-Qaida linked Islamic State of Iraq and the Levant (ISIL) during a parade in Raqqa, Syria. Militants from an al-Qaida splinter group held a military parade in their stronghold in northeastern Syria, displaying US-made Humvees, heavy machine guns, and missiles captured from the Iraqi army for the first time since taking over large parts of the Iraq-Syria border. (AP Photo/Raqqa Media Center)

This undated image posted Wednesday, Aug. 27, 2014 by the Raqqa Media Center of the Islamic State group, a Syrian opposition group, which has been verified and is consistent with other AP reporting, shows Abu Moussa al-Ansari, a fighter from the Islamic State group, who they say was killed in the battle for the Tabqa air base, in Raqqa, Syria. A U.N. commission on Wednesday accused the extremist Islamic State organization of committing crimes against humanity with attacks on civilians, as pictures emerged of the extremists' bloody takeover of a Syrian military air base that added to the international organizationâs claims. (AP Photo/ Raqqa Media Center of the Islamic State group)

This undated image posted by the Raqqa Media Center, a Syrian opposition group, on Monday, June 30, 2014, which has been verified and is consistent with other AP reporting, shows fighters from the al-Qaida linked Islamic State of Iraq and the Levant (ISIL) during a parade in Raqqa, Syria. Militants from an al-Qaida splinter group held a military parade in their stronghold in northeastern Syria, displaying U.S.-made Humvees, heavy machine guns, and missiles captured from the Iraqi army for the first time since taking over large parts of the Iraq-Syria border. (AP Photo/Raqqa Media Center)

FILE - In this Tuesday, Oct . 7, 2014 file photo, Iraqi security forces hold a flag of the Islamic State group they captured during an operation outside Amirli, some 105 miles (170 kilometers) north of Baghdad, Iraq. The Islamic State group may be sprouting tentacles across the region but it is struggling in Syria, part of its heartland, where it has stalled or even lost ground in fighting with multiple enemies on multiple fronts. There are signs of tensions and powers struggles emerging among its ranks of foreign jihadis. (AP Photo, File)

FILE - In this Dec. 21, 2014, file photo, Yazidi fighters gather on the summit of Mount Sinjar as they head to battle Islamic State militants, in Iraq. The Islamic State group may be sprouting tentacles across the region but it is struggling in Syria, part of its heartland, where it has stalled or even lost ground in fighting with multiple enemies on multiple fronts. There are signs of tensions and powers struggles emerging among its ranks of foreign jihadis. (AP Photo/Dalton Bennett, File)

FILE - In this Oct. 22, 2014, file photo, thick smoke from an airstrike by the US-led coalition rises in Kobani, Syria, as seen from a hilltop on the outskirts of Suruc, at the Turkey-Syria border. The Islamic State group may be sprouting tentacles across the region but it is struggling in Syria, part of its heartland, where it has stalled or even lost ground in fighting with multiple enemies on multiple fronts. There are signs of tensions and powers struggles emerging among its ranks of foreign jihadis. (AP Photo/Lefteris Pitarakis, File)

FILE - This Wednesday, Dec. 24, 2014 file image posted by the Raqqa Media Center, which monitors events in territory controlled by Islamic State militants with the permission of the extremist group, shows militants with a captured pilot, Mu'ath Al-Kaseasbeh, wearing a white shirt, in Raqqa, Syria. A video released online Tuesday, Feb. 3, 2015, purportedly shows a Jordanian pilot captured by the Islamic State extremist group in Syria last month being burned to death by his captors. The Associated Press was not immediately able to confirm the authenticity of the video, which was released on militant websites and bore the logo of the extremist group's al-Furqan media service (AP Photo/Raqqa Media Center, File)

FILE - In this undated file photo posted on Wednesday, Aug. 27, 2014 by the Raqqa Media Center of the Islamic State group, a militant extremist group, which has been verified and is consistent with other AP reporting, fighters of the Islamic State wave the group's flag from a damaged display of a government fighter jet following the battle for the Tabqa air base, in Raqqa, Syria. The Islamic State group may be sprouting tentacles across the region but it is struggling in Syria, part of its heartland, where it has stalled or even lost ground in fighting with multiple enemies on multiple fronts. There are signs of tensions and powers struggles emerging among its ranks of foreign jihadis. (AP Photo/Raqqa Media Center of the Islamic State group, File)

FILE - In this undated file image posted on Monday, June 30, 2014, by the Raqqa Media Center of the Islamic State group, a Syrian opposition group, which has been verified and is consistent with other AP reporting, fighters from the Islamic State group parade in Raqqa, north Syria. The Islamic State group may be sprouting tentacles across the region but it is struggling in Syria, part of its heartland, where it has stalled or even lost ground in fighting with multiple enemies on multiple fronts. There are signs of tensions and powers struggles emerging among its ranks of foreign jihadis. (AP Photo/Raqqa Media Center of the Islamic State group, File)

This undated image posted Wednesday, Aug. 27, 2014 by the Raqqa Media Center of the Islamic State group, a Syrian opposition group, which has been verified and is consistent with other AP reporting, shows fighters from the Islamic State group that captured the Tabqa air base from the Syrian government on Sunday, praying inside the air base, in Raqqa, Syria. A U.N. commission on Wednesday accused the extremist Islamic State organization of committing crimes against humanity with attacks on civilians, as pictures emerged of the extremists' bloody takeover of a Syrian military air base that added to the international organizationâs claims. (AP Photo/ Raqqa Media Center of the Islamic State group)

FILE - In this undated file image posted by the Raqqa Media Center of the Islamic State group, on Monday, June. 30, 2014, which has been verified and is consistent with other AP reporting, fighters from Islamic State group sit on their tank during a parade in Raqqa, Syria. The Islamic State group is often described as the most fearsome jihadi outfit of all: a global menace outweighing al-Qaida, with armies trembling before its advance. But while the group has been successful at seizing parts of Iraq and Syria, it is no unstoppable juggernaut. (AP Photo/Raqqa Media Center, File)

FILE - In this undated image posted on Monday, June 30, 2014, by the Raqqa Media Center of the Islamic State group, a militant extremist group, which has been verified and is consistent with other AP reporting, fighters from the Islamic State group parade in Raqqa, Syria. In their Syrian strongholds, extremists from the Islamic State group have been moving into civilian apartment buildings for cover for days before warplanes of the U.S. and its allies began pounding them before dawn Tuesday, Sept. 23, 2014. Breaking the radicalsâ hold over the string of cities they have captured in both Iraq and Syria will be complicated because the group can easily melt into the population. (AP Photo/Raqqa Media Center of the Islamic State group, File)

In this Saturday, Sept. 27, 2014 photo released by the U.S. Air Force, a B-1B Lancer disengages from a KC-135 Stratotanker after refueling during U.S.-led airstrikes on Islamic State group targets in Syria. Nearly 2 out of 3 Americans back U.S. airstrikes to combat Islamic extremists and half also think there's a high risk of a future terrorist attack on American soil. Americans surveyed for an Associated Press-GfK poll are split on whether they approve of the way President Barack Obama is generally handling the threat from the Islamic State group and other terrorists. Yet despite more than a decade of costly war, about a third favor going even beyond airstrikes and putting U.S. military boots on the ground in Iraq or Syria â something Obama says he has no plans to do. (AP Photo/Staff Sgt. Ciara Wymbs, U.S. Air Force)

In this Saturday, Sept. 27 photo released by the U.S. Air Force, a fighter jet flies over northern Iraq after conducting airstrikes in Syria against Islamic State group targets in Syria. Nearly 2 out of 3 Americans back U.S. airstrikes to combat Islamic extremists and half also think there's a high risk of a future terrorist attack on American soil. Americans surveyed for an Associated Press-GfK poll are split on whether they approve of the way President Barack Obama is generally handling the threat from the Islamic State group and other terrorists. Yet despite more than a decade of costly war, about a third favor going even beyond airstrikes and putting U.S. military boots on the ground in Iraq or Syria â something Obama says he has no plans to do. (AP Photo/Senior Airman Matthew Bruch, U.S. Air Force)

RAQQA, SYRIA - NOVEMBER 28: At least 5 people killed and cars,buildings destroyed during the air strikes by Syrian army warplanes on the ISIL-held northern city of Raqqa, Syria on November 28,2014. (Photo by Stringer/Anadolu Agency/Getty Images)

Anwar al-Tarawneh, center, the wife of Jordanian pilot, Lt. Muath al-Kaseasbeh, who is held by Islamic State group militants, holds a posters of him with Arabic that reads, "we are all Muath," during a protest in Amman, Jordan, Tuesday, Feb. 3, 2015. Al-Kaseasbeh was seized after his F-16 jet crashed near the Islamic State group's de facto capital, Raqqa, Syria, in December last year. (AP Photo/Raad Adayleh)

FILE - This Nov. 20, 2014 file photo shows an area controlled by the Islamic State group, past the Qada Azadi roundabout, foreground, in Kobani, Syria. Kurdish fighters backed by intense U.S.-led airstrikes pushed the Islamic State group almost entirely out of the Syrian town of Kobani on Monday, Jan. 26, 2015, marking a major loss for extremists whose hopes for easy victory dissolved into a bloody, costly siege that seems close to ending in defeat. (AP Photo/Jake Simkin, File)

SANLIURFA, TURKEY - JANUARY 16: A photograph taken from Suruc district of Sanliurfa, Turkey, near Turkish-Syrian border crossing shows smoke rising from the Syrian border town of Kobani (Ayn al-Arab) following the US-led coalition airstrikes against the Islamic State of Iraq and the Levant (ISIL) targets on January 16, 2015. (Photo by Halil Fidan/Anadolu Agency/Getty Images)

FILE - In this Wednesday, Nov. 19, 2014 file photo, Kurdish People's Protection Units (YPG) soldiers walk near the town entrance circle heading to their strongholds in Kobani, Syria. With more than a thousand militants killed and territory slipping away, the Islamic State group is losing its grip on the Syrian border town of Kobani under intense U.S.-led airstrikes and astonishingly stiff resistance by Kurdish fighters. (AP Photo/Jake Simkin, File)

FILE - In this Monday, Nov. 17, 2014 file photo, smoke rises from the Syrian city of Kobani, following an airstrike by the U.S.-led coalition, seen from a hilltop outside Suruc, on the Turkey-Syria border. With more than a thousand militants killed and territory slipping away, the Islamic State group is losing its grip on the Syrian border town of Kobani under intense U.S.-led airstrikes and astonishingly stiff resistance by Kurdish fighters. (AP Photo/Vadim Ghirda, File)

FILE - This undated file photo posted on Monday, Nov. 4, 2014 by the Raqqa Media Office of the Islamic State group, a militant extremist group, shows fighting in Kobani, Syria. With more than a thousand militants killed and territory slipping away, the Islamic State group is losing its grip on the Syrian border town of Kobani under intense U.S.-led airstrikes and astonishingly stiff resistance by Kurdish fighters. (AP Photo/Raqqa Media Office, File)

FILE - This undated file photo posted on Monday, Nov. 4, 2014 by the Raqqa Media Office of the Islamic State group, a militant extremist group, shows Islamic state group fighters in Kobani, Syria. With more than a thousand militants killed and territory slipping away, the Islamic State group is losing its grip on the Syrian border town of Kobani under intense U.S.-led airstrikes and astonishingly stiff resistance by Kurdish fighters. (AP Photo/Raqqa Media Office, File)

In this Wednesday, Nov. 19, 2014 photo, a young Kurdish fighter runs past sniper fire in the contested zone in Kobani, Syria. Here, Kurdish fighters backed by small numbers of Iraqi peshmerga forces and Syrian rebels, are locked in what they see as an existential battle against the Islamic State group, who swept into their town in mid-September as part of a summer blitz after the Islamic State group overran large parts of Syria and neighboring Iraq. But the battle comes with an onerous price for the townâs residents. While most managed to flee across the nearby border with Turkey, some 2,000 Kurdish civilians have opted to stay with the hope that fighting will soon subside _ a shocking contrast from the population of 50,000 that once filled these streets. (AP Photo/Jake Simkin)

In this Wednesday, Nov. 19, 2014 photo, a Kurdish People's Protection Units (YPG) fighter shows the extent of the damage from a truck bomb in Kobani, Syria. Here, Kurdish fighters backed by small numbers of Iraqi peshmerga forces and Syrian rebels, are battling what they see as an existential battle against the militants who swept into their town in mid-September as part of a summer blitz that saw the group seize large chunks of territory in Syria and neighboring Iraq.(AP Photo/Jake Simkin)

In this Wednesday, Nov. 19, 2014 photo, a young Kurdish People's Protection Units (YPG) fighter who recently volunteered holds a position with a PKM in Kobani, Syria. Here, Kurdish fighters backed by small numbers of Iraqi peshmerga forces and Syrian rebels, are battling what they see as an existential battle against the militants who swept into their town in mid-September as part of a summer blitz that saw the group seize large chunks of territory in Syria and neighboring Iraq.(AP Photo/Jake Simkin)

In this Wednesday, Nov. 19, 2014 photo, a Free Syrian Army fighter from Shams Al-Shamal heads to the front line in Kobani, Syria. Here, Kurdish fighters backed by small numbers of Iraqi peshmerga forces and Syrian rebels, are battling what they see as an existential battle against the militants who swept into their town in mid-September as part of a summer blitz that saw the group seize large chunks of territory in Syria and neighboring Iraq.(AP Photo/Jake Simkin)

In this Wednesday, Nov. 19, 2014 photo, Kurdish People's Protection Units (YPG) fighters take position at a stronghold in Kobani, Syria. Here, Kurdish fighters backed by small numbers of Iraqi peshmerga forces and Syrian rebels, are battling what they see as an existential battle against the militants who swept into their town in mid-September as part of a summer blitz that saw the group seize large chunks of territory in Syria and neighboring Iraq.(AP Photo/Jake Simkin)

This Wednesday, Nov. 19, 2014 photo shows what remains in Kobani, Syria after fighting between Islamic State militants, Kurdish fighters and US-led airstrikes. Here, Kurdish fighters backed by small numbers of Iraqi peshmerga forces and Syrian rebels, are battling what they see as an existential battle against the militants who swept into their town in mid-September as part of a summer blitz that saw the group seize large chunks of territory in Syria and neighboring Iraq.(AP Photo/Jake Simkin)

In this Wednesday, Nov. 19, 2014 photo, Free Syrian Army fighters walk in the ruins of town market place in Kobani, Syria. Here, Kurdish fighters backed by small numbers of Iraqi peshmerga forces and Syrian rebels, are battling what they see as an existential battle against the militants who swept into their town in mid-September as part of a summer blitz that saw the group seize large chunks of territory in Syria and neighboring Iraq.(AP Photo/Jake Simkin)

In this Wednesday, Nov. 19, 2014 photo, a Free Syrian Army fighter takes a break in Kobani, Syria. Here, Kurdish fighters backed by small numbers of Iraqi peshmerga forces and Syrian rebels, are battling what they see as an existential battle against the militants who swept into their town in mid-September as part of a summer blitz that saw the group seize large chunks of territory in Syria and neighboring Iraq.(AP Photo/Jake Simkin)

In this Wednesday, Nov. 19, 2014 photo, a motorcycle is left behind near shops destroyed by the fighting in Kobani, Syria. Here, Kurdish fighters backed by small numbers of Iraqi peshmerga forces and Syrian rebels, are battling what they see as an existential battle against the militants who swept into their town in mid-September as part of a summer blitz that saw the group seize large chunks of territory in Syria and neighboring Iraq.(AP Photo/Jake Simkin)

A military plane of the US led coalition circles above the Syrian town of Kobani, seen from a hilltop outside Suruc, on the Turkey-Syria border Sunday, Nov. 9, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Vadim Ghirda)

In this Wednesday, Nov. 19, 2014 photo, debris and broken glass remain in an abandoned mosque in Kobani, Syria. Here, Kurdish fighters backed by small numbers of Iraqi peshmerga forces and Syrian rebels, are battling what they see as an existential battle against the militants who swept into their town in mid-September as part of a summer blitz that saw the group seize large chunks of territory in Syria and neighboring Iraq.(AP Photo/Jake Simkin)

In this Wednesday, Nov. 19, 2014 photo, Kurdish People's Protection Units (YPG) soldiers walk near the town entrance circle heading to their strongholds in Kobani, Syria. Here, Kurdish fighters backed by small numbers of Iraqi peshmerga forces and Syrian rebels, are battling what they see as an existential battle against the militants who swept into their town in mid-September as part of a summer blitz that saw the group seize large chunks of territory in Syria and neighboring Iraq.(AP Photo/Jake Simkin)

A Syrian Kurdish refugee child from the Kobani area looks through a ventilation hole of a tent at a camp in Suruc, on the Turkey-Syria border Wednesday, Nov. 19, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Vadim Ghirda)

In this Wednesday, Nov. 19, 2014 photo, Kurdish People's Protection Units (YPG) fighters are seen in Kobani, Syria. Here, Kurdish fighters backed by small numbers of Iraqi peshmerga forces and Syrian rebels, are battling what they see as an existential battle against the militants who swept into their town in mid-September as part of a summer blitz that saw the group seize large chunks of territory in Syria and neighboring Iraq.(AP Photo/Jake Simkin)

SANLIURFA, TURKEY - NOVEMBER 09: A photograph taken from Suruc district of Sanliurfa, Turkey, shows smoke rising from the Syrian border town of Kobani (Ayn al-Arab) following the US-led coalition airstrikes against the Islamic State of Iraq and the Levant (ISIL) targets on November 09, 2014. (Photo by Ali Ihsan Ozturk/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - NOVEMBER 09: A photograph taken from Suruc district of Sanliurfa, Turkey, shows smoke rising from the Syrian border town of Kobani (Ayn al-Arab) following the US-led coalition airstrikes against the Islamic State of Iraq and the Levant (ISIL) targets on November 09, 2014. (Photo by Ali Ihsan Ozturk/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - NOVEMBER 9: Smoke rising during the clashes between Islamic State of Iraq and Levant (ISIL) members and armed groups in Kobani (Ayn al-Arab), is seen from Suruc district of Turkey's Sanliurfa on November 9, 2014. (Photo by Ali Ihsan Ozturk/Anadolu Agency/Getty Images)

Smoke rises from an Islamic State position in eastern Kobani, after an airstrike by the US led coalition, seen from a hilltop outside Suruc, on the Turkey-Syria border Saturday, Nov. 8, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Vadim Ghirda)

A military plane of the US led coalition flies above the Syrian town of Kobani, seen from a hilltop outside Suruc, on the Turkey-Syria border Sunday, Nov. 9, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Vadim Ghirda)

A military plane of the US led coalition circles between vapor trails from other fighter aircraft above the Syrian town of Kobani, seen from a hilltop outside Suruc, on the Turkey-Syria border Sunday, Nov. 9, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Vadim Ghirda)

Smoke rises from an Islamic State position in eastern Kobani, after an airstrike by the US led coalition, seen from a hilltop outside Suruc, on the Turkey-Syria border Saturday, Nov. 8, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Vadim Ghirda)

SANLIURFA, TURKEY - OCTOBER 30 : A photograph taken from Suruc district of Sanliurfa, Turkey, near Turkish-Syrian border crossing shows smoke rising from the Syrian border town of Kobani (Ayn al-Arab) following the US-led coalition airstrikes against the Islamic State of Iraq and the Levant (ISIL) targets on October 30, 2014. (Photo by Rauf Maltas/Anadolu Agency/Getty Images)

Smoke rises from an Islamic State position in eastern Kobani, after an airstrike by the US led coalition, seen from a hilltop outside Suruc, on the Turkey-Syria border Saturday, Nov. 8, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Vadim Ghirda)

Smoke rises from an Islamic State position in eastern Kobani, after an airstrike by the US led coalition, seen from a hilltop outside Suruc, on the Turkey-Syria border Saturday, Nov. 8, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Vadim Ghirda)

Iraqi Kurdish peshmerga fighters stand at a staging area on the outskirts of Suruc, near the Turkey-Syria border, across from the Syrian town of Kobani, Thursday, Oct. 30, 2014. Ten Iraqi peshmerga fighters entered the northern Syrian border town of Kobani, also known as Ayn Arab, crossing over from Turkey on Thursday, the first from among a group of 150 Kurdish troops on their way into the embattled city.(AP Photo/Vadim Ghirda)

SANLIURFA, TURKEY - OCTOBER 30 : A photograph taken from Suruc district of Sanliurfa, Turkey, near Turkish-Syrian border crossing shows smoke rising from the Syrian border town of Kobani (Ayn al-Arab) following the US-led coalition airstrikes against the Islamic State of Iraq and the Levant (ISIL) targets on October 30, 2014. (Photo by Rauf Maltas/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - OCTOBER 30 : A photograph taken from Suruc district of Sanliurfa, Turkey, near Turkish-Syrian border crossing shows smoke rising from the Syrian border town of Kobani (Ayn al-Arab) following the US-led coalition airstrikes against the Islamic State of Iraq and the Levant (ISIL) targets on October 30, 2014. (Photo by Rauf Maltas/Anadolu Agency/Getty Images)

MOSUL, IRAQ - JULY 5 : An image grab taken from a video released on July 5, 2014 by Al-Furqan Media shows alleged Islamic State of Iraq and the Levant (ISIL) leader Abu Bakr al-Baghdadi preaching during Friday prayer at a mosque in Mosul.(Photo by Al-Furqan Media/Anadolu Agency/Getty Images)

MOSUL, IRAQ - JULY 5 : An image grab taken from a video released on July 5, 2014 by Al-Furqan Media shows alleged Islamic State of Iraq and the Levant (ISIL) leader Abu Bakr al-Baghdadi preaching during Friday prayer at a mosque in Mosul.(Photo by Al-Furqan Media/Anadolu Agency/Getty Images)

Iraq's Defence Minister Khaled al-Obeidi, third left, meets with U.S. Army General Martin Dempsey, third right, chairman of the Joint Chiefs of Staff, at the defence ministry in Baghdad, Saturday, Nov. 15, 2014. The visit by Dempsey came just two days after he told Congress that the United States would consider dispatching a modest number of American forces to fight with Iraqi troops against the extremist Islamic State group. (AP/Photo

SANLIURFA, TURKEY - OCTOBER 30: Iraqi Kurdish Peshmerga military convoy, carrying heavy weapons belonging to Peshmerga forces, arrives in Suruc town, near the Syrian border, on their way to Syria to help defend the Syrian town of Kobani against ISIL militants on October 30, 2014 in Sanliurfa, Turkey. Iraqi Kurdish Regional Government has sent its forces to fight alongside the armed groups against Islamic State of Iraq and Levant (ISIL) militants in Kobani (Ayn al-Arab) within a special arrangement with Turkey. (Photo by Rauf Maltas/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - OCTOBER 30: Iraqi Kurdish Peshmerga military convoy, carrying heavy weapons belonging to Peshmerga forces, arrives in Suruc town, near the Syrian border, on their way to Syria to help defend the Syrian town of Kobani against ISIL militants on October 30, 2014 in Sanliurfa, Turkey. Iraqi Kurdish Regional Government has sent its forces to fight alongside the armed groups against Islamic State of Iraq and Levant (ISIL) militants in Kobani (Ayn al-Arab) within a special arrangement with Turkey. (Photo by Rauf Maltas/Anadolu Agency/Getty Images)

A Turkish soldier closes the gate of a staging area where Iraqi Kurdish peshmerga fighters are stationed on the outskirts of Suruc, near the Turkey-Syria border, across from the Syrian town of Kobani, Thursday, Oct. 30, 2014. Ten Iraqi peshmerga fighters entered the northern Syrian border town of Kobani, also known as Ayn Arab, crossing over from Turkey on Thursday, the first from among a group of 150 Kurdish troops on their way into the embattled city. (AP Photo/Vadim Ghirda)

An Iraqi Kurdish peshmerga fighter walks at a staging area on the outskirts of Suruc, near the Turkey-Syria border, across from the Syrian town of Kobani, Thursday, Oct. 30, 2014. Ten Iraqi peshmerga fighters entered the northern Syrian border town of Kobani, also known as Ayn Arab, crossing over from Turkey on Thursday, the first from among a group of 150 Kurdish troops on their way into the embattled city.(AP Photo/Vadim Ghirda)

SIRNAK, TURKEY - OCTOBER 29: People welcome Iraqi Kurdish Peshmerga forces' military convoy, carrying heavy weapons as it crosses into Turkey from the Habur border crossing in Sirnak province of Turkey, on October 29, 2014. Iraqi Kurdish Regional Government has sent its forces to fight alongside the armed groups against Islamic State of Iraq and Levant (ISIL) militants in Kobani (Ayn al-Arab) within a special arrangement with Turkey. (Photo by Ahmet Bolat/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - OCTOBER 20: A photo taken from the Suruc district of Sanliurfa, Turkey, shows that smoke rises after the Islamic State of Iraq and the Levant (ISIL) carried out a suicide attack with two bomb-laden vehicles in Kobani (Ayn al-Arab), Syria, on October 20, 2014. (Photo by Murat Kula/Anadolu Agency/Getty Images)

SIRNAK, TURKEY - OCTOBER 29: A boy, holding Iraqi Kurdish Regional Government, flashes V sign as people welcome Iraqi Kurdish Peshmerga forces' military convoy, carrying heavy weapons as it crosses into Turkey from the Habur border crossing in Sirnak province of Turkey, on October 29, 2014. Iraqi Kurdish Regional Government has sent its forces to fight alongside the armed groups against Islamic State of Iraq and Levant (ISIL) militants in Kobani (Ayn al-Arab) within a special arrangement with Turkey. (Photo by Ahmet Bolat/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - OCTOBER 20: (TURKEY OUT) An explosion rocks Syrian city of Kobane during a reported suicide car bomb attack by the militants of Islamic State (ISIS) group on a People's Protection Unit (YPG) position in the city center of Kobani, as seen from the outskirts of Suruc, on the Turkey-Syria border, October 20, 2014 in Sanliurfa province, Turkey. According to Foreign Minister Mevlut Cavusoglu, Turkey will reportedly allow Iraqi Kurdish fighters to cross the Syrian border to fight Islamic State (IS) militants in the Syrian city of Kobane while the United States has sent planes to drop weapons, ammunition and medical supplies to Syrian Kurdish fighters around Kobane. (Photo by Gokhan Sahin/Getty Images)

SANLIURFA, TURKEY - OCTOBER 20: (TURKEY OUT) An explosion rocks Syrian city of Kobane during a reported suicide car bomb attack by the militants of Islamic State (ISIS) group on a People's Protection Unit (YPG) position in the city center of Kobani, as seen from the outskirts of Suruc, on the Turkey-Syria border, October 20, 2014 in Sanliurfa province, Turkey. According to Foreign Minister Mevlut Cavusoglu, Turkey will reportedly allow Iraqi Kurdish fighters to cross the Syrian border to fight Islamic State (IS) militants in the Syrian city of Kobane while the United States has sent planes to drop weapons, ammunition and medical supplies to Syrian Kurdish fighters around Kobane. (Photo by Gokhan Sahin/Getty Images)

SANLIURFA, TURKEY - OCTOBER 20: A photo taken from the Suruc district of Sanliurfa, Turkey, shows that smoke rises after the Islamic State of Iraq and the Levant (ISIL) carried out a suicide attack with two bomb-laden vehicles in Kobani (Ayn al-Arab), Syria, on October 20, 2014. (Photo by Murat Kula/Anadolu Agency/Getty Images)

Smoke and flames rise following an explosion in the Syrian town of Kobane, also known as Ain al-Arab, as seen from the southeastern Turkish village of Mursitpinar in the Sanliurfa province on October 20, 2014. Turkey dropped its refusal to allow Kurdish fighters over the border to defend the besieged Syrian town of Kobane, saying it was now helping Iraqi peshmerga to cross the frontier in a major policy shift. AFP PHOTO / BULENT KILIC (Photo credit should read BULENT KILIC/AFP/Getty Images)

Smoke and flames rise following an explosion in the Syrian town of Kobane, also known as Ain al-Arab, as seen from the southeastern Turkish village of Mursitpinar in the Sanliurfa province on October 20, 2014. Turkey dropped its refusal to allow Kurdish fighters over the border to defend the besieged Syrian town of Kobane, saying it was now helping Iraqi peshmerga to cross the frontier in a major policy shift. AFP PHOTO / BULENT KILIC (Photo credit should read BULENT KILIC/AFP/Getty Images)

SANLIURFA, TURKEY - OCTOBER 20: (TURKEY OUT) An explosion rocks Syrian city of Kobane during a reported suicide car bomb attack by the militants of Islamic State (ISIS) group on a People's Protection Unit (YPG) position in the city center of Kobani, as seen from the outskirts of Suruc, on the Turkey-Syria border, October 20, 2014 in Sanliurfa province, Turkey. According to Foreign Minister Mevlut Cavusoglu, Turkey will reportedly allow Iraqi Kurdish fighters to cross the Syrian border to fight Islamic State (IS) militants in the Syrian city of Kobane while the United States has sent planes to drop weapons, ammunition and medical supplies to Syrian Kurdish fighters around Kobane. (Photo by Gokhan Sahin/Getty Images)

SANLIURFA, TURKEY - OCTOBER 20: People watch the clashes between the Islamic State of Iraq and the Levant (ISIL) and Kurdish armed group near the Syrian border town of Kobani (Ayn al-Arab), from Suruc district of Sanliurfa, Turkey on October 20, 2014. (Photo by Murat Kula/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - OCTOBER 20: People watch the clashes between the Islamic State of Iraq and the Levant (ISIL) and Kurdish armed group near the Syrian border town of Kobani (Ayn al-Arab), from Suruc district of Sanliurfa, Turkey on October 20, 2014. (Photo by Murat Kula/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - OCTOBER 20: A photograph taken from Suruc district of Sanliurfa, Turkey, shows smoke rising from the Syrian border town of Kobani (Ayn al-Arab) following the clashes between Islamic State of Iraq and Levant (ISIL) and Kurdish armed groups on October 20, 2014. (Photo by Murat Kula/Anadolu Agency/Getty Images)

Kurdish people observe smoke rising from the Syrian town of Kobane, also known as Ain al-Arab, following an explosion as seen from the southeastern Turkish village of Mursitpinar in the Sanliurfa province on October 20, 2014. US President Barack Obama called his Turkish counterpart Recep Tayyip Erdogan and they pledged to step up the fight against the Islamic State group in Syria, the White House said. Kurdish fighters have been under IS assault for more than a month around Kobane, which has become a key prize as it is being fought under the gaze of the world's press massed just over the border in Turkey. AFP PHOTO / BULENT KILIC (Photo credit should read BULENT KILIC/AFP/Getty Images)

SANLIURFA, TURKEY - OCTOBER 20: People watch the clashes between the Islamic State of Iraq and the Levant (ISIL) and Kurdish armed group near the Syrian border town of Kobani (Ayn al-Arab), from Suruc district of Sanliurfa, Turkey on October 20, 2014. (Photo by Murat Kula/Anadolu Agency/Getty Images)

Flames rise following an explosion in the Syrian town of Kobane, also known as Ain al-Arab, as seen from the southeastern Turkish village of Mursitpinar in the Sanliurfa province on October 20, 2014. US President Barack Obama called his Turkish counterpart Recep Tayyip Erdogan and they pledged to step up the fight against the Islamic State group in Syria, the White House said. Kurdish fighters have been under IS assault for more than a month around Kobane, which has become a key prize as it is being fought under the gaze of the world's press massed just over the border in Turkey. AFP PHOTO / BULENT KILIC (Photo credit should read BULENT KILIC/AFP/Getty Images)

Weapons system video of U.S. airstrike against an ISIL compound northwest of Ar Raqqah, Syria, Sept. 23, 2014.

NVG footage of U.S. F-16's getting fuel from a U.S. KC-135 Stratotanker, Sept. 23, 2014, during air strikes against ISIL in Syria.

U.S. airstrike on Jeribe West Modular Refinery, Syria, Sept. 24, 2014.
The United States conducted this strike as part of the President’s comprehensive strategy to degrade and ultimately defeat ISIL. Going forward, the U.S. military will continue to conduct targeted airstrikes against ISIL in Syria and Iraq as local forces go on the offensive against this terrorist group.

Smoke from a fire rises following a strike in Kobani, Syria, during fighting between Syrian Kurds and the militants of Islamic State group, as seen from a hilltop on the outskirts of Suruc, at the Turkey-Syria border, Sunday, Oct. 19, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Lefteris Pitarakis)

Smoke from a fire rises following a strike in Kobani, Syria, during fighting between Syrian Kurds and the militants of Islamic State group, as seen from a hilltop on the outskirts of Suruc, at the Turkey-Syria border, Sunday, Oct. 19, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Lefteris Pitarakis)

This image taken from a hilltop in Mursitpinar on the outskirts of Suruc at the Turkey-Syria border, shows Kurdish fighters driving a machine gun-fitted pick-up truck, decorated with a flag of The Peopleâs Protection Units, or YPG, the main Kurdish militia in Syria, in Kobani, Syria, Sunday, Oct. 19, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Levend Ali)

In this image taken from a hilltop in Mursitpinar on the outskirts of Suruc at the Turkey-Syria border, Kurdish fighters walk to their positions in Kobani, Syria, Sunday, Oct. 19, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Levend Ali)

Syrian refugee children, one flashing the V-sign, peer through the window of a school building serving as a refugee center in the Turkish border town of Suruc, Turkey, trying to catch a glimpse of visiting UN Humanitarian chief Valerie Amos, who was holding a meeting in a nearby room, Sunday, Oct. 19, 2014. The refugee center houses more than 5,000 people who fled the area of Kobani, a Syrian Kurdish town on the border with Turkey, when Islamic State group fighters intensified their assault on the town last month. Amos said 900,000 Syrian refugees have been registered in Turkey since the Syrian crisis began four years ago, but that the true number was closer to 1.6 million. (AP Photo/Elena Becatoros)

Smoke rises following a strike on the western outskirts of Kobani, Syria, as seen from a hilltop on the outskirts of Suruc, at the Turkey-Syria border, during fighting between Syrian Kurds and the militants of Islamic State group,Sunday, Oct. 19, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Lefteris Pitarakis)

Smoke rises following a strike in Kobani, Syria, during fighting between Syrian Kurds and the militants of Islamic State group, as seen from a hilltop on the outskirts of Suruc, at the Turkey-Syria border, Sunday, Oct. 19, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Lefteris Pitarakis)

A boy uses a mobile phone to photograph the western outskirts of Kobani, Syria on the distance, as he stands on a hilltop on the outskirts of Suruc, at the Turkey-Syria border, Sunday, Oct. 19, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Lefteris Pitarakis)

People gather on a hilltop on the outskirts of Suruc, at the Turkey-Syria border, to watch the fighting between Syrian Kurds and the militants of Islamic State group in Kobani, Syria, Sunday, Oct. 19, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Lefteris Pitarakis)

Smoke from a mortar fired from inside Kobani, Syria, rises as it lands within Turkey, on the outskirts of Suruc, at the Turkey-Syria border, Sunday, Oct. 19, 2014. At least three mortars landed in open areas in Turkey but Turkish forces did not retaliate. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. , Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Lefteris Pitarakis)

People gather on a hilltop on the outskirts of Suruc, at the Turkey-Syria border, to watch in the distance the fighting between Syrian Kurds and the militants of Islamic State group in Kobani, Syria, Sunday, Oct. 19, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Lefteris Pitarakis)

People gather on a hilltop on the outskirts of Suruc, at the Turkey-Syria border, to watch in the distance the fighting between Syrian Kurds and the militants of Islamic State group in Kobani, Syria, Sunday, Oct. 19, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Lefteris Pitarakis)

Thick smoke and flames from a fire rises following a strike in Kobani, Syria, during fighting between Syrian Kurds and the militants of the Islamic State group, as seen from a hilltop on the outskirts of Suruc, at the Turkey-Syria border, Sunday, Oct. 19, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Lefteris Pitarakis)

Members of the media on a hilltop on the outskirts of Suruc, at the Turkey-Syria border, watch as smoke from a fire rises following a strike in Kobani, Syria, during fighting between Syrian Kurds and the militants of Islamic State group, Sunday, Oct. 19, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Lefteris Pitarakis)

A man, backdropped by members of the media, sits on a hilltop on the outskirts of Suruc, at the Turkey-Syria border, as they watch in the distance the fighting between Syrian Kurds and the militants of Islamic State group in Kobani, Syria, Sunday, Oct. 19, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Lefteris Pitarakis)

Smoke rises following a strike in Kobani, Syria, during fighting between Syrian Kurds and the militants of the Islamic State group, as seen from a hilltop on the outskirts of Suruc, at the Turkey-Syria border, Sunday, Oct. 19, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Lefteris Pitarakis)

Smoke rises following a strike in Kobani, Syria, during fighting between Syrian Kurds and the militants of the Islamic State group, as seen from a hilltop on the outskirts of Suruc, at the Turkey-Syria border, Sunday, Oct. 19, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Lefteris Pitarakis)

Thick smoke and flames from a fire rises following a strike in Kobani, Syria, during fighting between Syrian Kurds and the militants of the Islamic State group, as seen from a hilltop on the outskirts of Suruc, at the Turkey-Syria border, Sunday, Oct. 19, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Lefteris Pitarakis)

Fighter jets fly over Kobani, Syria, during fighting between Syrian Kurds and the militants of Islamic State group, as seen from a hilltop on the outskirts of Suruc, at the Turkey-Syria border, Sunday, Oct. 19, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Levend Ali)

In this photo shot with an extreme telephoto lens and through haze from a hilltop in Mursitpinar on the outskirts of Suruc at the Turkey-Syria border, Kurdish fighters walk to their positions next to a machine gun-fitted pick-up truck, in Kobani, Syria, Sunday, Oct. 19, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Levend Ali)

Smoke rises following a strike in Kobani, Syria, during fighting between Syrian Kurds and the militants of Islamic State group, as seen from a hilltop on the outskirts of Suruc, at the Turkey-Syria border, Sunday, Oct. 19, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Lefteris Pitarakis)

Thick smoke from a fire rises following a strike in Kobani, Syria, during fighting between Syrian Kurds and the militants of Islamic State group, as seen from a hilltop on the outskirts of Suruc, at the Turkey-Syria border, Sunday, Oct. 19, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Lefteris Pitarakis)

Thick smoke from a fire rises following a strike in Kobani, Syria, during fighting between Syrian Kurds and the militants of Islamic State group, as seen from a hilltop on the outskirts of Suruc, at the Turkey-Syria border, Sunday, Oct. 19, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Lefteris Pitarakis)

SANLIURFA, TURKEY - OCTOBER 18: A photograph taken from Suruc district of Sanliurfa, Turkey, shows flames rising from the Syrian border town of Kobani (Ayn al-Arab) following the US-led coalition airstrikes against the Islamic State of Iraq and the Levant (ISIL) targets on October 18, 2014. (Photo by Murat Kula/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - OCTOBER 18: (TURKEY OUT) People are silhouetted on the top of a hill close to the border line between Turkey and Syria near Mursitpinar bordergate as they watch the U.S led airstrikes over the Syrian town of Kobani on October 18, 2014 in Sanliurfa, Turkey. Kurdish fighters in Syrian city of Kobani have pushed back Islamic State militants in a number of locations as U.S. airstrikes on ISIS positions continue in and around the city. Since mid-September more than 200,000 people from Kobani flee into Turkey. (Photo by Gokhan Sahin/Getty Images)

GAZIANTEP, TURKEY - OCTOBER 18: A photograph taken from Suruc district of Sanliurfa, Turkey, shows flames and smoke rising from an explosion in the Syrian border town of Kobani (Ayn al-Arab) following a US-led coalition airstrike hits an Islamic State of Iraq and the Levant (ISIL) target on October 18, 2014. (Photo by Omer Urer/Anadolu Agency/Getty Images)

GAZIANTEP, TURKEY - OCTOBER 18: A photograph taken from Suruc district of Sanliurfa, Turkey, shows flames and smoke rising from an explosion in the Syrian border town of Kobani (Ayn al-Arab) following a US-led coalition airstrike hits an Islamic State of Iraq and the Levant (ISIL) target on October 18, 2014. (Photo by Omer Urer/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - OCTOBER 18: (TURKEY OUT) Heavy smoke rises following an airstrike by the US-led coalition aircraft in Kobani, Syria, during fighting between Syrian Kurds and the militants of Islamic State group, as seen from the outskirts of Suruc, on the Turkey-Syria border, October 18, 2014. Kurdish fighters in Syrian city of Kobani have pushed back Islamic State militants in a number of locations as U.S. airstrikes on ISIS positions continue in and around the city. Since mid-September more than 200,000 people from Kobani flee into Turkey. (Photo by Gokhan Sahin/Getty Images)

SANLIURFA, TURKEY - OCTOBER 18: (TURKEY OUT) An explosion rocks the Syrian city of Kobani during an airstrike by the US-led coalition during fighting between Syrian Kurds and the militants of Islamic State group, as seen from the outskirts of Suruc, on the Turkey-Syria border, October 18, 2014. Kurdish fighters in Syrian city of Kobani have pushed back Islamic State militants in a number of locations as U.S. airstrikes on ISIS positions continue in and around the city. Since mid-September more than 200,000 people from Kobani flee into Turkey. (Photo by Gokhan Sahin/Getty Images)

Flames rise from an explosion in the Syrian town of Kobane, also known as Ain al-Arab, after a US-led coalition strike, as seen from the Turkish border in the southeastern village of Mursitpinar, Sanliurfa province, on October 18, 2014. Turkey is turning a deaf ear to insistent pressure to take a more pro-active stance in the fight against Islamic State (IS) jihadists, adding to existing strains with the West under President Recep Tayyip Erdogan. Western diplomats have repeatedly made clear they want to see the key NATO member play a key role in the coalition against the militants, who are battling for the Syrian town Kobane just a few kilometers from Turkey. AFP PHOTO / ARIS MESSINIS (Photo credit should read ARIS MESSINIS/AFP/Getty Images)

Smoke rises following an airstrike by the US-led coalition in Kobani, Syria while fighting continued between Syrian Kurds and the militants of Islamic State group, as seen from Mursitpinar on the outskirts of Suruc, at the Turkey-Syria border, Wedesday, Oct. 15, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Lefteris Pitarakis)

Smoke rises following a strike in Kobani, Syria while fighting continued between Syrian Kurds and the militants of Islamic State group, as seen from Mursitpinar on the outskirts of Suruc, at the Turkey-Syria border, Wednesday, Oct. 15, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Lefteris Pitarakis)

Turkish soldiers hold their positions with their tank on a hilltop on the outskirts of Suruc, at the Turkey-Syria border, overlooking Kobani, Syria, during fighting between Syrian Kurds and the militants of Islamic State group, Wednesday, Oct. 15, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Lefteris Pitarakis)

In this image shot with an extreme telephoto lens and through haze from a hilltop, Kurdish fighters walk to their positions, in Kobani, Syria, seen from Mursitpinar, on the outskirts of Suruc, at the Turkey-Syria border, Wednesday, Oct. 15, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Lefteris Pitarakis)

Turkish police officers secure a basketball stadium, where Syrian Kurdish people were kept after they were detained, in Suruc, at the Turkey-Syria border, Tuesday, Oct. 14, 2014. According to Mustafa Ban, one of the detainees, more than 100 men, women and children are being detained since crossing from Kobani, Syria into Turkey last week. Dozens of the detainees have been on a hunger strike since Oct. 6, and the reason is that because Turkish authorities are refusing to free them from the stadium. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. The onslaught has forced more than 200,000 people to flee across the border into Turkey. (AP Photo/Lefteris Pitarakis)

Thick smoke rises following an airstrike by the US-led coalition in Kobani, Syria as fighting continued between Syrian Kurds and the militants of Islamic State group, as seen from Mursitpinar on the outskirts of Suruc, at the Turkey-Syria border, Monday, Oct. 13, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters.(AP Photo/Lefteris Pitarakis)

A Kurdish man stands next to another looking through binoculars towards the Syrian town of Ain al-Arab, known as Kobane by the Kurds, from the Turkish-Syrian border in the southeastern village of Mursitpinar in the Sanliurfa province on October 15, 2014. US-led aircraft will continue bombing near the Syrian town of Ain al-Arab (Kobane) and in western Iraq, President Barack Obama said after talks with military leaders from an international coalition fighting the Islamic State group. AFP PHOTO / ARIS MESSINIS (Photo credit should read ARIS MESSINIS/AFP/Getty Images)

SANLIURFA, TURKEY - OCTOBER 14: Turkish security forcers members stand guard the gate while the wounded Syrian Kurds are carried to the Turkish side of boder in Mursitpinar crossing in Turkey's Sanliurfa province on October 14, 2014, as the clashes between the Islamic State of Iraq and Levant (ISIL) and Kurdish armed troops continue in Kobane (Ayn al-arab) city of Syria. (Photo by Omer Urer/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - OCTOBER 14: (TURKEY OUT) Abandoned houses in the Syrian city of Kobani after fighting between Syrian Kurds and militants from Islamic State, on October 14, 2014 as seen from the outskirts of Suruc, on the Turkey-Syria border. The strategic border town of Kobani has been beseiged by Islamic State militants since mid-September forcing more than 200,000 people to flee into Turkey. (Photo by Gokhan Sahin/Getty Images)

Kurdish Ali Mehmud mourns at the grave of his brother Seydo Mehmud 'Curo' , a Kurdish fighter, who was killed in the fighting with the militants of the Islamic State group in Kobani, Syria, and was buried at a cemetery in Suruc, on the Turkey-Syria border, Saturday, Oct. 11, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Lefteris Pitarakis)

Men mourn at the grave of a relative, name not given, who was a Kurdish fighter killed in fighting with the militants of the Islamic State group in Kobani, Syria, and was buried at a cemetery in Suruc, on the Turkey-Syria border, Saturday, Oct. 11, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Lefteris Pitarakis)

Rabia Ali mourns at the grave of her son Seydo Mehmud 'Curo', a Kurdish fighter who was killed in fighting with militants of the Islamic State group in Kobani, Syria, and was buried on Tuesday, Oct. 7, at a cemetery in Suruc, on the Turkey-Syria border, Saturday, Oct. 11, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Lefteris Pitarakis)

A Kurdish man writes the name of a Kurdish fighter, who was killed in the fighting with the militants of the Islamic State group in Kobani, Syria, at his grave at a cemetery in Suruc, on the Turkey-Syria border, Saturday, Oct. 11, 2014, Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Lefteris Pitarakis)

Kurdish women mourn their loved one, who was killed in the fighting with the militants of the Islamic State group in Kobani, Syria, and was buried at a cemetery in Suruc, on the Turkey-Syria border, Saturday, Oct. 11, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Lefteris Pitarakis)

Kurdish Rabia Ali, right, accompanied by her son Ali Mehmud, left, mourn on Saturday, Oct. 11, 2014, at the grave of her son Seydo Mehmud 'Curo' , a Kurdish fighter, who was killed in the fighting with the militants of the Islamic State group in Kobani, Syria, and was buried at a cemetery in Suruc, on the Turkey-Syria border on Tuesday, Oct. 7. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Lefteris Pitarakis)

Turkish Kurds watch the fighting between militants of the Islamic State group and Kurdish forces in Kobani, Syria, visible at background left, from Mursitpinar, on the outskirts of Suruc, on the Turkey-Syria border, Tuesday, Oct. 7, 2014. Kobani, also known as Ayn Arab and its surrounding areas have been under attack since mid-September, with militants capturing dozens of nearby Kurdish villages. (AP Photo/Lefteris Pitarakis)

A Turkish Kurd, standing in Mursitpinar, in the outskirts of Suruc, on the Turkey-Syria border, watches smoke from fires caused by strikes during fighting between militants of the Islamic State group and Kurdish forces in Kobani, Syria, background, Sunday, Oct. 12, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (AP Photo/Lefteris Pitarakis)

A protester holds a placard as he marches in front of the Greek parliament in Athens, Wednesday Oct. 8, 2014, during a demonstration seeking to draw attention to the Islamic State's onslaught against the Kurdish town of Kobani in northern Syria. (AP Photo/Kostas Tsironis)

In this Oct. 8, 2014, photo, a huge plume of smoke rises after an airstrike in eastern Kobani, Syria, behind a hilltop where militants with the Islamic State group had raised their flag on Monday, as fighting intensified between Syrian Kurds and the militants as seen from Mursitpinar on the outskirts of Suruc, at the Turkey-Syria border. As it prods Turkey to step up in the global fight against Islamic State militants, the United States is at the same time worried that military action by Ankara may also target Kurdish fighters who are the last line of defense on the ground between the extremists and the Syrian border town of Kobani. In a careful-what-you-wish-for scenario, U.S. officials acknowledge that Turkey could use the war on Islamic militants to simultaneously go after the Peopleâs Protection Group, a Kurdish fighting force. Known as the YPG, the fighters are linked to the Kurdistan Workerâs Party, or PKK _ a Kurdish separatist guerrilla movement that is fiercely opposed by the Turks, and that Ankara and Washington have designated a terrorist organization.(AP Photo/Lefteris Pitarakis)

FILE - In this Saturday, Oct. 11, 2014 file photo, a Syrian Kurdish refugee who fled Kobani, carries a mattress to the family tent at a refugee camp in Suruc, Turkey on the Turkey-Syria border. The predominantly Kurdish town of Kobani has been transformed from a dusty backwater into a symbol of resistance for Kurds around the world. The battle against the Islamic State group is now playing out in Kobaniâs streets and alleyways - a fight being watched by scores of Syrian and Turkish Kurds, as well as dozens of journalists, through binoculars from hilltops and farms just across the border in Turkey. The international media spotlight, has helped turn the defense of Kobani into a very public test for the American-led international effort to roll back and ultimately destroy the Islamic State group. (AP Photo/Lefteris Pitarakis, File)

SANLIURFA, TURKEY - OCTOBER 9: A photograph taken from the border line in Suruc district of Sanliurfa, southeastern province of Turkey, shows smoke rises during the clashes between the Islamic State of Iraq and Levant (ISIL) and Kurdish armed groups in Kobani (Ayn al-Arab) city of Syria on October 9, 2014. (Photo by Ibrahim Erikan/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - OCTOBER 9: A photograph taken from the border line in Suruc district of Sanliurfa, southeastern province of Turkey, shows militants of Islamic State of Iraq and the Levant (ISIL) as they are walking in the town of Kobani during the clashes between the Islamic State of Iraq and Levant (ISIL) and Kurdish armed groups continue in Kobani (Ayn al-Arab) city of Syria on October 9, 2014. (Photo by Ibrahim Erikan/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - OCTOBER 9: A photograph taken from the border line in Suruc district of Sanliurfa, southeastern province of Turkey, shows smoke rises during the clashes between the Islamic State of Iraq and Levant (ISIL) and Kurdish armed groups in Kobani (Ayn al-Arab) city of Syria on October 9, 2014. (Photo by Ibrahim Erikan/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - OCTOBER 9: A photograph taken from the border line in Suruc district of Sanliurfa, southeastern province of Turkey, shows destroyed buildings and rising smoke as a result of clashes between the Islamic State of Iraq and Levant (ISIL) and Kurdish armed groups in Kobane (Ayn al-Arab) city of Syria on October 9, 2014. (Photo by Emin Menguarslan/Anadolu Agency/Getty Images)

Smoke rises from the southwest of the Syrian town of Ain al-Arab, known as Kobane by the Kurds, following air strikes as seen from the Turkish-Syrian border in the southeastern town of Suruc, Sanliurfa province, on October 7, 2014. Fresh air strikes by the US-led coalition hit positions held by Islamic State jihadists in the southwest of the key Syrian border town of Ain al-Arab (Kobane), according to an AFP journalist just across the border in Turkey. The strikes came a day after the extremists pushed into Kobane, seizing three districts in the city's east after fierce street battles with its Kurdish defenders. AFP PHOTO / ARIS MESSINIS (Photo credit should read ARIS MESSINIS/AFP/Getty Images)

Alleged Islamic State (IS) militants stand next to a black IS flag atop a hill in at the eastern part of the Syrian town of Ain al-Arab, known as Kobane by the Kurds, as seen from the Turkish-Syrian border in the southeastern town of Suruc, Sanliurfa province, on October 7, 2014. Fresh air strikes by the US-led coalition hit positions held by Islamic State jihadists in the southwest of the key Syrian border town of Ain al-Arab (Kobane), according to an AFP journalist just across the border in Turkey. The strikes came a day after the extremists pushed into Kobane, seizing three districts in the city's east after fierce street battles with its Kurdish defenders. AFP PHOTO / ARIS MESSINIS (Photo credit should read ARIS MESSINIS/AFP/Getty Images)

Smoke rises from the southwest of the Syrian town of Ain al-Arab, known as Kobane by the Kurds, following air strikes as seen from the Turkish-Syrian border in the southeastern town of Suruc, Sanliurfa province, on October 7, 2014. Fresh air strikes by the US-led coalition hit positions held by Islamic State jihadists in the southwest of the key Syrian border town of Ain al-Arab (Kobane), according to an AFP journalist just across the border in Turkey. The strikes came a day after the extremists pushed into Kobane, seizing three districts in the city's east after fierce street battles with its Kurdish defenders. AFP PHOTO / ARIS MESSINIS (Photo credit should read ARIS MESSINIS/AFP/Getty Images)

Smoke rises from the southwest of the Syrian town of Ain al-Arab, known as Kobane by the Kurds, following air strikes as seen from the Turkish-Syrian border in the southeastern town of Suruc, Sanliurfa province, on October 7, 2014. Fresh air strikes by the US-led coalition hit positions held by Islamic State jihadists in the southwest of the key Syrian border town of Ain al-Arab (Kobane), according to an AFP journalist just across the border in Turkey. The strikes came a day after the extremists pushed into Kobane, seizing three districts in the city's east after fierce street battles with its Kurdish defenders. AFP PHOTO / ARIS MESSINIS (Photo credit should read ARIS MESSINIS/AFP/Getty Images)

SANLIURFA, TURKEY - OCTOBER 07: A photo taken from the Suruc district of Sanliurfa, Turkey shows smoke rises from Ayn al-Arab city (Kobani) of Syria after the US-led coalition bombed the targets of the Islamic State of Iraq and the Levant (ISIL) in Ayn al-Arab, on October 7, 2014. (Photo by Ibrahim Erikan/Anadolu Agency/Getty Images)

Turkish forces armored vehicles secure the border road in Mursitpinar, on the outskirts of Suruc, as fighting in nearby Kobani, Syria intensified between Syrian Kurds and militants of Islamic State group, at the Turkey-Syria border, Tuesday, Oct. 7, 2014. Kobani, also known as Ayn Arab and its surrounding areas have been under attack since mid-September, with militants capturing dozens of nearby Kurdish villages.(AP Photo/Lefteris Pitarakis)

Smoke rises after a airstrike in Kobani, Syria as fighting intensified between Syrian Kurds and the militants of Islamic State group, as seen from Mursitpinar in the outskirts of Suruc, at the Turkey-Syria border, Tuesday, Oct. 7, 2014. Kobani, also known as Ayn Arab and its surrounding areas have been under attack since mid-September, with militants capturing dozens of nearby Kurdish villages.(AP Photo/Lefteris Pitarakis)

In this image shot with an extreme telephoto lens and through haze from the outskirts of Suruc at the Turkey-Syria border, militants with the Islamic State group are seen after placing their group's flag on a hilltop at the eastern side of the town of Kobani, Syria, where fighting had been intensified between Syrian Kurds and the militants of Islamic State group, Monday, Oct. 6, 2014. Kobani, also known as Ayn Arab and its surrounding areas have been under attack since mid-September, with militants capturing dozens of nearby Kurdish villages. The flag is indicating that the jihadists may have regrouped and broken through the Kurdish lines. (AP Photo/Lefteris Pitarakis)

In this image shot with an extreme telephoto lens and through haze from the outskirts of Suruc at the Turkey-Syria border, a man is seen placing a black banner with white writing over a hilltop at the eastern side of the town of Kobani, Syria, where fighting had ben intensified between Syrian Kurds and the militants of Islamic State, Monday, Oct. 6, 2014. Kobani, also known as Ayn Arab and its surrounding areas have been under attack since mid-September, with militants capturing dozens of nearby Kurdish villages. The flag is indicating that the jihadists may have regrouped and broken through the Kurdish lines.(AP Photo/Lefteris Pitarakis)

Turkish forces officers backdropped by tanks stand on a hilltop in the outskirts of Suruc, at the Turkey-Syria border, overlooking Kobani in Syria where fighting had ben intensified between Syrian Kurds and the militants of Islamic State, Monday, Oct. 6, 2014. Kobani, also known as Ayn Arab and its surrounding areas have been under attack since mid-September, with militants capturing dozens of nearby Kurdish villages. (AP Photo/Lefteris Pitarakis)

A Turkish Kurd, standing in the outskirts of Suruc, on the Turkey-Syria border, use binoculars to watch the fighting between militants of the Islamic State group and Kurdish forces in Kobani, Syria, Monday, Oct. 6, 2014. Kobani, also known as Ayn Arab and its surrounding areas have been under attack since mid-September, with militants capturing dozens of nearby Kurdish villages. (AP Photo/Lefteris Pitarakis)

In this image shot with an extreme telephoto lens and through haze from the outskirts of Suruc at the Turkey-Syria border, men are seen after placing a black banner with white writing over a hilltop at the eastern side of the town of Kobani, Syria, where fighting had ben intensified between Syrian Kurds and the militants of Islamic State, Monday, Oct. 6, 2014. Kobani, also known as Ayn Arab and its surrounding areas have been under attack since mid-September, with militants capturing dozens of nearby Kurdish villages. The flag is indicating that the jihadists may have regrouped and broken through the Kurdish lines.(AP Photo/Lefteris Pitarakis)

Press photographers take pictures of Turkish tanks holding their positions on a hilltop in the outskirts of Suruc, at the Turkey-Syria border, overlooking Kobani in Syria where fighting had ben intensified between Syrian Kurds and the militants of Islamic State, group Monday, Oct. 6, 2014. Kobani, also known as Ayn Arab and its surrounding areas have been under attack since mid-September, with militants capturing dozens of nearby Kurdish villages.(AP Photo/Lefteris Pitarakis)

An Islamic State (IS) flag is placed on a hill in the Syrian town of Ain al-Arab, known as Kobane by the Kurds, as seen from the Turkish-Syrian border in the southeastern town of Suruc, Sanliurfa province, on October 6, 2014. Two flags of Islamic State (IS) jihadists seeking to take the Syrian town of Kobane were flying on the eastern side of the town, an AFP photographer reported. The flags, black with the Arabic lettering of the group, were seen by the photographer from the Turkish side of the border. One flew on a building while another larger flag was planted on a hill. AFP PHOTO / ARIS MESSINIS (Photo credit should read ARIS MESSINIS/AFP/Getty Images)

SANLIURFA, TURKEY - OCTOBER 6 : Turkish Armed Forces soldiers are seen on the hills at the Turkey - Syria boder in Sanliurfa, Turkey as the clashes between the Islamic State of Iraq and the Levant (ISIL) and Kurdish armed groups continue in Ayn al-Arab city (Kobani) on October 6, 2014. (Photo by Halil Fidan/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - OCTOBER 06: Tanks of Turkish Armed Forces are seen on the hills at the Turkey - Syria borderline in the Suruc district of Sanliurfa Turkey, as the clashes between the Islamic State of Iraq and the Levant (ISIL) and Kurdish armed groups continue in Ayn al-Arab city (Kobani) on October 6, 2014. (Photo by Ozge Elif Kizil/Anadolu Agency/Getty Images)

Smoke rises after a shell lands in Kobani in Syria as fighting intensifies between Syrian Kurds and the militants of Islamic State group, as seen from the outskirts of Suruc, at the Turkey-Syria border, Monday, Oct. 6, 2014. Kobani, also known as Ayn Arab and its surrounding areas have been under attack since mid-September, with militants capturing dozens of nearby Kurdish villages. (AP Photo/Lefteris Pitarakis)

Turkish soldiers on armoured vehicles drive to their new position at Mursitpinar near Suruc, at the Turkey-Syria border, Sunday, Oct. 5, 2014, as fighting intensified between Syrian Kurds and the militants of Islamic State group in Kobani. Kobani, also known as Ayn Arab, is just a few hundred meters inside Syria and its surrounding areas have been under attack since mid-September, with militants capturing dozens of nearby Kurdish villages. (AP Photo/Lefteris Pitarakis)

Members of Turkish forces, some in riot gear to confront potential Kurdish demonstrators, stand by the side of the road at Mursitpinar near Suruc, at the Turkey-Syria border, as fighting intensified between Syrian Kurds and the militants of Islamic State group in Kobani, Sunday, Oct. 5, 2014. Kobani, also known as Ayn Arab, just a few hundred meters inside Syria and its surrounding areas have been under attack since mid-September, with militants capturing dozens of nearby Kurdish villages. (AP Photo/Lefteris Pitarakis)

A Turkish soldier takes his position a few hundreds meters from the the Turkey-Syria border in Mursitpinar, near Suruc, Turkey, as fighting intensified between Syrian Kurds and the militants of Islamic State Sunday Oct. 5, 2014. Kobani and its surrounding areas have been under attack since mid-September, with militants capturing dozens of nearby Kurdish villages. (AP Photo/Burhan Ozbilici)

Smoke rises after a shell lands in Kobani in Syria as fighting intensifies between Syrian Kurds and the militants of Islamic State group, as seen from Mursitpinar near Suruc, at the Turkey-Syria border, Sunday, Oct. 5, 2014. Kobani and its surrounding areas have been under attack since mid-September, with militants capturing dozens of nearby Kurdish villages. (AP Photo/Lefteris Pitarakis)

Turkish soldiers pursue protesters after using teargas to disperse demonstrators a few hundred meters from the border with Syria, as fighting intensified nearby between Syrian Kurds and the militants of Islamic State group in nearby Kobani, Syria, from their vantage point near Suruc, Turkey, Saturday, Oct. 4, 2014. Turkey's parliament approved Thursday a motion that gives the government new powers to launch military incursions into Syria and Iraq and to allow foreign forces to use its territory for possible operations against the Islamic State group. (AP Photo/Burhan Ozbilici)

Smoke rises from the Syrian town of Ain al-Arab, known as Kobane by the Kurds, seen from the Mursitpinar border crossing on the Turkish-Syrian border in the southeastern town of Suruc, Sanliurfa province, on October 5, 2014. Turkey warned on October 4 it would not hesitate to strike back at Islamic State jihadists if they attacked Turkish troops stationed at Ankara's exclave inside Syria. AFP PHOTO / ARIS MESSINIS (Photo credit should read ARIS MESSINIS/AFP/Getty Images)

SANLIURFA, TURKEY - OCTOBER 5: Photograph taken from Sanliurfa's Suruc district, Turkey, shows smoke rises from Syria's Ayn al-Arab city (Kobani) following the shelling during clashes between Islamic State of Iraq and the Levant (ISIL) and Kurdish armed groups in Ayn al-Arab city on October 5, 2014. (Photo by Emin Menguarslan/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - OCTOBER 05: After the howitzer shell fired from Syria, where the clashes between Islamic State of Iraq and Levant (ISIL) and Kurdish armed troops continue, into Turkey, Turkish military forces take security measures at the border line in the Suruc district of Sanliurfa, Turkey, on October 5, 2014. Military tanks are sent to Turkey - Syria border line. Veli Gurgah / Anadolu Agency

US Vice President Joe Biden (L) shakes hands with Turkish Cypriot leader Dervis Eroglu (R) during a meeting in the northern Turkish-controlled area of Nicosia, the capital of the east Mediterranean island of Cyprus on May 22, 2014. The breakaway state that Eroglu leads is recognised only by Turkey, and the US vice president moved swiftly to reassure Greek Cypriots that the meeting signalled no change in US policy.
AFP PHOTO / YIANNIS KOURTOGLOU (Photo credit should read Yiannis Kourtoglou/AFP/Getty Images)

SANLIURFA, TURKEY - OCTOBER 2: Turkish armed forces take security measures in Suruc district of Sanliurfa, Turkey as the clashes near to the Turkish-Syrian border intensify between Islamic State of Iraq and the Levant (ISIL) and Syrian Kurdish armed groups in Ayn al-Arab (Kobane), on October 2, 2014. (Photo by Ismail Hakki Demir/Anadolu Agency/Getty Images)

Strike on a tank in Iraq

SANLIURFA, TURKEY - OCTOBER 2: Photograph taken from Suruc district of Sanliurfa, Turkey shows that smoke rises following the shelling as the clashes near to the Turkish-Syrian border intensify between Islamic State of Iraq and the Levant (ISIL) and Syrian Kurdish armed groups in Ayn al-Arab (Kobane), on October 2, 2014. (Photo by Ismail Hakki Demir/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - OCTOBER 2: Photograph taken from Suruc district of Sanliurfa, Turkey shows that smoke rises following the shelling as the clashes near to the Turkish-Syrian border intensify between Islamic State of Iraq and the Levant (ISIL) and Syrian Kurdish armed groups in Ayn al-Arab (Kobane), on October 2, 2014. (Photo by Ismail Hakki Demir/Anadolu Agency/Getty Images)

Strike on vehicle in Iraq

Air strike against an ISIL-held building east of Al Hasakah, Syria

Strike on a weapons storage facility, Al Hasakah Military Garrison in South Milibya, Syria.

In this Monday, June 9, 2014 photo, Turkish truck drivers Ceyhun Ismaloglu, left, and Servet Karakan relax on the grounds of the Qayara Power Station in Iraq. The drivers were kidnapped by Islamic State the following morning and would spend more than three weeks as captives to the feared militant group. The ordeal ended without violence or a physical ransom, according to an account of the kidnapping pieced together by The Associated Press. The episode paints a picture of a militant group unusually careful not to anger Turkeyâs government - and offers insight into the mysterious release of 49 Turkish hostages just over a week ago. (AP Photo/Ozgur Simsek)

In this photo taken on Saturday, Sept. 27, 2014, a worker cleans a restaurant terrace overlooking the border town of Cizre, Turkey. Cizre and its surrounding area is home to many of the 32 drivers held hostage by the Islamic State group earlier this year. For many foreigners, being caught by the groupâs fanatical fighters would mean months of uncertainty, torture and, eventually, a gruesome death. For driver Ozgur Simsek and his colleagues, captivity would last just over three weeks. Their trucks were confiscated, but no one was harmed and no ransom was paid, according to an account of the June 10 attack pieced together by The Associated Press from interviews with drivers and a company executive. The episode paints a picture of a militant group unusually careful not to anger Turkeyâs government - and may offer insight into the mysterious release of 49 Turkish hostages just over a week ago. (AP Photo/Raphael Satter)

In this Friday July 4, 2014 photo, Turkish truck driver Ozgur Simsek, 20, left, smiles at the camera as he and other captives are released by militants from the Islamic State group. The captive drivers, who are being ferried across the Iraqi desert in pickup trucks before being dropped off to walk the rest of the way to Kurdish-controlled northern Iraq, spent more than three weeks as hostages of Islamic State. The ordeal ended without violence or a physical ransom, according to an account of the kidnapping pieced together by The Associated Press. The episode paints a picture of a militant group unusually careful not to anger Turkey's government - and offers insight into the mysterious release of 49 Turkish hostages just over a week ago. (AP Photo/Serdar Bayrak)

In this photo taken on Saturday, Sept. 27, 2014, a worker cleans a restaurant terrace overlooking the border town of Cizre, Turkey. Cizre and its surrounding area is home to many of the 32 drivers held hostage by the Islamic State group earlier this year. For many foreigners, being caught by the groupâs fanatical fighters would mean months of uncertainty, torture and, eventually, a gruesome death. For driver Ozgur Simsek and his colleagues, captivity would last just over three weeks. Their trucks were confiscated, but no one was harmed and no ransom was paid, according to an account of the June 10 attack pieced together by The Associated Press from interviews with drivers and a company executive. The episode paints a picture of a militant group unusually careful not to anger Turkeyâs government - and may offer insight into the mysterious release of 49 Turkish hostages just over a week ago. (AP Photo/Raphael Satter)

In this photo taken Saturday, Sept. 27, 2014, truck driver Serdar Bayrak speaks during an interview at his home in Cizre, Turkey. The 32-year-old was among 32 drivers held hostage by the Islamic State group earlier this year. For many foreigners, being caught by the groupâs fanatical fighters would mean months of uncertainty, torture and, eventually, a gruesome death. For Bayrak and his colleagues, captivity would last just over three weeks. Their trucks were confiscated, but no one was harmed and no ransom was paid, according to an account of the June 10 attack pieced together by The Associated Press from interviews with drivers and a company executive. The episode paints a picture of a militant group unusually careful not to anger Turkeyâs government - and may offer insight into the mysterious release of 49 Turkish hostages just over a week ago. (AP Photo/Raphael Satter)

Turkish tanks roll to take positions along the Turkey-Syria border near Suruc, Turkey, Monday, Sept. 29, 2014. U.S.-led coalition air raids targeted towns and villages in northern and eastern Syria controlled by the Islamic State group, including one strike that hit a grain silo and reportedly killed civilians, activists said Monday.(AP Photo/Burhan Ozbilici)

Turkish tanks roll to take positions along the Turkey-Syria border near Suruc, Turkey, Monday, Sept. 29, 2014. U.S.-led coalition air raids targeted towns and villages in northern and eastern Syria controlled by the Islamic State group, including one strike that hit a grain silo and reportedly killed civilians, activists said Monday.(AP Photo/Burhan Ozbilici)

A transport aircraft takes off from Britain's Royal Air Force Base in Akrotiri, Cyprus, on Saturday, Sept. 27, 2014. Britain's Ministry of Defense said warplanes have taken off for their first combat mission over Iraq since Parliament approved airstrikes targeting the Islamic State group. The Tornado GR4 aircraft took off from RAF Akrotiri hours after Britain joined the U.S.-led coalition of nations that are launching airstrikes against the extremists. (AP Photo/Petros Karadjias)

A Canadian military transport aircraft comes in to land at Britain's Royal Air Force Base in Akrotiri, Cyprus, on Saturday, Sept. 27, 2014. Britain's Ministry of Defence said warplanes have taken off for their first combat mission over Iraq since Parliament approved airstrikes targeting the Islamic state group. The Tornado GR4 aircraft took off from RAF Akrotiri on Cyprus on Saturday, hours after Britain joined the U.S.-led coalition of nations that are launching airstrikes against the extremists. (AP Photo/Petros Karadjias)

A soldier patrols at the Gare de Lyon train station in Paris, Friday, Sept. 26, 2014. France is considering whether to extend its airstrikes to Syria and is increasing security in public places after militants linked to the Islamic State group beheaded a French hostage, officials said Thursday. (AP Photo/Christophe Ena)

Soldiers patrol through the courtyard of the Louvre museum, as tourists take pictures, in Paris, Friday, Sept. 26, 2014. France is considering whether to extend its airstrikes to Syria and is increasing security in public places after militants linked to the Islamic State group beheaded a French hostage, officials said Thursday. (AP Photo/Christophe Ena)

In this framegrabbed image provided by the U.S. Department of Defense shows airstrike footage on the Jeribe West Refinery in Syria Wednesday Sept. 24, 2014. The strikes aimed to knock out one of the militants' main revenue streams _ black market oil sales that the U.S. says earn up to $2 million a day for the group. (AP Photo/Department of Defense)

In this Tuesday, Sept. 23, 2014 photo released by the U.S. Air Force, a formation of U.S. Navy F-18E Super Hornets leaves after receiving fuel from a KC-135 Stratotanker over northern Iraq as part of U.S. led coalition airstrikes on the Islamic State group and other targets in Syria. U.S.-led airstrikes targeted Syrian oil installations held by the militant Islamic State group overnight and early Thursday, Sept. 25, 2014, killing nearly 20 people as the militants released dozens of detainees in their de facto capital, fearing further raids, activists said. (AP Photo/U.S. Air Force, Staff Sgt. Shawn Nickel)

In this Tuesday, Sept. 23, 2014 photo released by the U.S. Air Force, a formation of U.S. Navy F-18E Super Hornets leaves after receiving fuel from a KC-135 Stratotanker over northern Iraq, as part of U.S. led coalition airstrikes on the Islamic State group and other targets in Syria. U.S.-led airstrikes targeted Syrian oil installations held by the militant Islamic State group overnight and early Thursday, Sept. 25, 2014, killing nearly 20 people as the militants released dozens of detainees in their de facto capital, fearing further raids, activists said. (AP Photo/U.S. Air Force, Staff Sgt. Shawn Nickel)

In this image released Wednesday, Sept. 24, 2014 by the official Saudi Press Agency, Saudi pilots pose for a group portrait after taking part in U.S.-led coalition airstrikes on Islamic State militants and other targets in Syria that began early Tuesday. Arab countriesâ prominent role in initial airstrikes against the Islamic State group in Syria shatters the notion of what a typical American-led military operation looks like and won the Mideast allies' praise from U.S. President Barack Obama for their willingness to stand âshoulder-to-shoulder" with the United States. It is a reflection of their growing concern about the threat posed by Islamic extremists, and a chance to flex some military muscle toward regional rival Iran _ a key supporter of governments in both Syria and Iraq. The strategy is not without risks. (AP Photo/Saudi Press Agency)

In this June 13, 2013 photo provided by the Emirates News Agency, WAM, Maj. Mariam al-Mansouri, the first Emirati female fighter jet pilot, right, walks with other pilots at an undisclosed location in United Arab Emirates. A senior United Arab Emirates diplomat says the Gulf federationâs first female air force pilot helped carry out airstrikes against Islamic State militants earlier this week. The Emirati embassy in Washington said on its official Twitter feed Thursday, Sept. 25, 2014 that Ambassador Yousef al-Otaiba confirmed the F-16 pilotâs role. Rumors had swirled on social media that Maj. Mariam al-Mansouri was involved in the strikes, but Emirati officials had not previously confirmed that was the case.(AP Photo/Emirates News Agency, WAM)

This June 13, 2013 photo provided by the Emirates News Agency, WAM, shows Mariam al-Mansouri, the first Emirati female fighter jet pilot gives the thumbs up as she sits in the cockpit of an aircraft, in United Arab Emirates. A senior United Arab Emirates diplomat says the Gulf federationâs first female air force pilot helped carry out airstrikes against Islamic State militants earlier this week. The Emirati embassy in Washington said on its official Twitter feed Thursday, Sept. 25, 2014 that Ambassador Yousef al-Otaiba confirmed the F-16 pilotâs role. Rumors had swirled on social media that Maj. Mariam al-Mansouri was involved in the strikes, but Emirati officials had not previously confirmed that was the case.(AP Photo/Emirates News Agency, WAM)

In this Tuesday, Sept. 23, 2014 photo released by the U.S. Air Force, a U.S. Navy F-18E Super Hornet approaches to receive fuel from a KC-135 Stratotanker over northern Iraq after conducting airstrikes as part of U.S. led coalition airstrikes on the Islamic State group and other targets in Syria. U.S.-led airstrikes targeted Syrian oil installations held by the militant Islamic State group overnight and early Thursday, Sept. 25, 2014, killing nearly 20 people as the militants released dozens of detainees in their de facto capital, fearing further raids, activists said. (AP Photo/U.S. Air Force, Staff Sgt. Shawn Nickel)

In this Tuesday, Sept. 23, 2014 photo released by the U.S. Air Force, a U.S. Navy F-18E Super Hornet receives fuel from a KC-135 Stratotanker over northern Iraq after conducting airstrikes ias part of U.S. led coalition airstrikes on the Islamic State group and other targets in Syria. U.S.-led airstrikes targeted Syrian oil installations held by the militant Islamic State group overnight and early Thursday, Sept. 25, 2014, killing nearly 20 people as the militants released dozens of detainees in their de facto capital, fearing further raids, activists said. (AP Photo/U.S. Air Force, Staff Sgt. Shawn Nickel)

In this Tuesday, Sept. 23, 2014 photo released by the U.S. Air Force, a formation of U.S. Navy F-18E Super Hornets leaves after receiving fuel from a KC-135 Stratotanker over northern Iraq, as part of U.S. led coalition airstrikes on the Islamic State group and other targets in Syria. U.S.-led airstrikes targeted Syrian oil installations held by the militant Islamic State group overnight and early Thursday, Sept. 25, 2014, killing nearly 20 people as the militants released dozens of detainees in their de facto capital, fearing further raids, activists said. (AP Photo/U.S. Air Force, Staff Sgt. Shawn Nickel)

ALEPPO, SYRIA - SEPTEMBER 25: A Syrian inspects the rubble of destroyed building, allegedly belonging to Al-Nusra Front following the U.S.-led coalition's airstrikes against the Islamic State of Iraq and the Levant (ISIL) on a residential area in northern Aleppo, Syria on September 25, 2014. (Photo by Ahmed Hasan Ubeyd/Anadolu Agency/Getty Images)

ALEPPO, SYRIA - SEPTEMBER 25: A Syrian inspects the rubble of destroyed building, allegedly belonging to Al-Nusra Front following the U.S.-led coalition's airstrikes against the Islamic State of Iraq and the Levant (ISIL) on a residential area in northern Aleppo, Syria on September 25, 2014. (Photo by Ahmed Hasan Ubeyd/Anadolu Agency/Getty Images)

ALEPPO, SYRIA - SEPTEMBER 25: Syrians inspect the rubble of destroyed building, allegedly belonging to Al-Nusra Front following the U.S.-led coalition's airstrikes against the Islamic State of Iraq and the Levant (ISIL) on a residential area in northern Aleppo, Syria on September 25, 2014. (Photo by Ahmed Hasan Ubeyd/Anadolu Agency/Getty Images)

ALEPPO, SYRIA - SEPTEMBER 25: Rubble of destroyed building, allegedly belonging to Al-Nusra Front, is seen following the U.S.-led coalition's airstrikes against the Islamic State of Iraq and the Levant (ISIL) on a residential area in northern Aleppo, Syria on September 25, 2014. (Photo by Ahmed Hasan Ubeyd/Anadolu Agency/Getty Images)

ALEPPO, SYRIA - SEPTEMBER 25: Rubble of destroyed building and a pickup truck, allegedly belonging to Al-Nusra Front, are seen following the U.S.-led coalition's airstrikes against the Islamic State of Iraq and the Levant (ISIL) on a residential area in northern Aleppo, Syria on September 25, 2014. (Photo by Ahmed Hasan Ubeyd/Anadolu Agency/Getty Images)

Lt. Gen. William C. Mayville Jr., Joint Staff Director of Operations Director of Operations, shows before and after photos as he speaks on the airstrikes in Syria during a briefing at the Pentagon September 23, 2014 in Washington, DC. Mayville briefed the press about US and Arab nation joint airstrikes against Islamic State(IS) group targets in Syria and unilateral airstrikes against an al-Qaeda group in Syria. AFP PHOTO/Brendan SMIALOWSKI (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images)

This undated image posted Wednesday, Aug. 27, 2014 by the Raqqa Media Center of the Islamic State group, a Syrian opposition group, which has been verified and is consistent with other AP reporting, shows Abu Moussa al-Ansari, a fighter from the Islamic State group, who they say was killed in the battle for the Tabqa air base, in Raqqa, Syria. A U.N. commission on Wednesday accused the extremist Islamic State organization of committing crimes against humanity with attacks on civilians, as pictures emerged of the extremists' bloody takeover of a Syrian military air base that added to the international organizationâs claims. (AP Photo/ Raqqa Media Center of the Islamic State group)

FILE - This undated file image posted on a militant website on Tuesday, Jan. 14, 2014, which has been verified and is consistent with other AP reporting, shows fighters from the al-Qaida linked Islamic State of Iraq and the Levant (ISIL) marching in Raqqa, Syria. Moderate Syrian rebels are buckling under the onslaught of the radical al-Qaida breakaway group that has swept over large parts of Iraq and Syria. Some rebels are giving up the fight, crippled by lack of weapons and frustrated with the power of the Islamic State of Iraq and the Levant. Other, more hard-line Syrian fighters are bending to the winds and joining the radicals. (AP Photo/Militant Website, File)

FILE - This undated file image posted on a militant website on Tuesday, Jan. 14, 2014, which has been verified and is consistent with other AP reporting, shows fighters from the al-Qaida linked Islamic State of Iraq and the Levant (ISIL) marching in Raqqa, Syria. Moderate Syrian rebels are buckling under the onslaught of the radical al-Qaida breakaway group that has swept over large parts of Iraq and Syria. Some rebels are giving up the fight, crippled by lack of weapons and frustrated with the power of the Islamic State of Iraq and the Levant. Other, more hard-line Syrian fighters are bending to the winds and joining the radicals. (AP Photo/Militant Website, File)

FILE- This undated image posted by the Raqqa Media Center, a Syrian opposition group, on Monday, June 30, 2014, which has been verified and is consistent with other AP reporting, shows fighters from the al-Qaida linked Islamic State group during a parade in Raqqa, Syria. The Gulf nation of Qatar is hitting back at suggestions that it supports the Islamic State extremist group, saying that âdetermined, collective actionâ is needed to end sectarian violence gripping Iraq and Syria. Qatari Foreign Minister Khalid bin Mohammed al-Attiyah unequivocally denied funding the extremist group. (AP Photo/Raqqa Media Center- File)

A screen grab from a video posted to YouTube by ISIS that claims to show journalist James Foley, who was abducted in 2012 while covering the Syria civil war, being beheaded.

FILE - In this file still image from an undated video released by Islamic State militants on Tuesday, Aug. 19, 2014, purports to show journalist Steven Sotloff being held by the militant group. Islamic State militants called American journalist James Foleyâs gruesome videotaped beheading revenge for U.S. airstrikes against the group, and they still hold at least three other Americans hostage, including Sotloff. (AP Photo, File)

FILE - In this undated image posted on Monday, June 30, 2014, by the Raqqa Media Center of the Islamic State group, a Syrian opposition group, which has been verified and is consistent with other AP reporting, fighters from the Islamic State group parade in Raqqa, north Syria. The U.S. and its allies are trying to hammer out a coalition to push back the Islamic State group in Iraq. But any serious attempt to destroy the militants or even seriously degrade their capabilities means targeting their infrastructure in Syria. That, however, is far more complicated. If it launches airstrikes against the group in Syria, the U.S. runs the risk of unintentionally strengthening the hand of President Bashar Assad, whose removal the West has actively sought the past three years. Uprooting the Islamic State, which has seized swaths of territory in both Syria and Iraq, would potentially open the way for the Syrian army to fill the vacuum. (AP Photo/Raqqa Media Center of the Islamic State group, File)

FILE - In this Aug. 8, 2014, file photo, Kurdish Peshmerga fighters take cover during airstrikes targeting militants of the Islamic State group near the Khazer checkpoint outside of the city of Irbil in northern Iraq. The U.S. and its allies are trying to hammer out a coalition to push back the Islamic State group in Iraq. But any serious attempt to destroy the militants or even seriously degrade their capabilities means targeting their infrastructure in Syria. That, however, is far more complicated. If it launches airstrikes against the group in Syria, the U.S. runs the risk of unintentionally strengthening the hand of President Bashar Assad, whose removal the West has actively sought the past three years. Uprooting the Islamic State, which has seized swaths of territory in both Syria and Iraq, would potentially open the way for the Syrian army to fill the vacuum. (AP Photo/Khalid Mohammed, File)

SALADIN, IRAQ - AUGUST 31: Iraqi armed forces have entered the northern town of Amirli which had been under the siege of Islamic State militants for over two months in Saladin ,Iraq on August 31, 2014. Supported by Kurdish forces and Shiite militias, the Iraqi army launched an offensive shortly after the U.S. carried out airstrikes against Islamic State (IS) positions near the town, and dropped aid for the nearly 20,000 Shiite Turkmen trapped in Amirli. The government forces and Kurdish peshmerga forces have been fighting against the militant group to block their advance. (Stringer - Anadolu Agency)

SALADIN, IRAQ - AUGUST 31: Shiite militias hold the Hezbollah flag after Iraqi forces have entered the northern town of Amirli which had been under the siege of Islamic State militants for over two months in Saladin ,Iraq on August 31, 2014. Supported by Kurdish forces and Shiite militias, the Iraqi army launched an offensive shortly after the U.S. carried out airstrikes against Islamic State (IS) positions near the town, and dropped aid for the nearly 20,000 Shiite Turkmen trapped in Amirli. The government forces and Kurdish peshmerga forces have been fighting against the militant group to block their advance. (Stringer - Anadolu Agency)

KHAZIR FRONTLINE, KRG, IRAQ - 2014/08/26: A Peshmerga soldier makes a victory sign on top of a bunker at the Khazir Frontline. Khazir refugee camp is located outside Kalak, a town halfway on the road between Erbil and Mosul. It was overrun by ISIS militants on the 7th of August following an unprecedented push of the Caliphate into Kurdish territory. Its thousands of Iraqi and Arab refugees were forced to flee again as the now deserted camp has become the new frontline between the Peshmerga and ISIS. It is the theatre of frequent U.S. airstrikes that have helped halt the ISIS advance into a stalemate situation. (Photo by Vianney Le Caer/Pacific Press/LightRocket via Getty Images)

MOSUL, IRAQ - AUGUST 19: Iraqi army forces and Peshmerga forces take security precautions against possible Islamic State (IS)-led terrorist groups' attacks with heavy weapons and armoured vehicles around the Mosul Dam on August 19, 2014 in Mosul, Iraq. IS-led militants had seized the control of the dam and they were driven after the U.S. airstrikes and ground offensive of Iraqi troops. (Photo by Sivan Siddik/Anadolu Agency/Getty Images)

A Peshmerga fighter looks at the remains of a car, bearing an image of the trademark jihadist flag, which reportedly belonged to Islamic State (IS) militants after it was targeted by an American air strike in the village of Baqufa, north of Mosul, on August 18, 2014. Kurdish peshmerga fighters backed by federal forces and US warplanes pressed a counter-offensive Monday against jihadists after retaking Iraq's largest dam, as the United States and Britain stepped up their military involvement. AFP PHOTO/AHMAD AL-RUBAYE (Photo credit should read AHMAD AL-RUBAYE/AFP/Getty Images)

MOSUL, IRAQ - AUGUST 9: Fierce clashes keep going on between Peshmerga forces and Islamic State-led armed groups outside of Makhmur district of Mosul, Iraq on August 9, 2014. It's stated that Peshmerga forces silence the Islamic State members with attacks staged with Iraqi air forces' strikes, Katyusha rockets, howitzers and heavy weapons. (Photo by Feriq Ferec/Anadolu Agency/Getty Images)

MOSUL, IRAQ - AUGUST 9: Fierce clashes keep going on between Peshmerga forces and Islamic State-led armed groups outside of Makhmur district of Mosul, Iraq on August 9, 2014. It's stated that Peshmerga forces silence the Islamic State members with attacks staged with Iraqi air forces' strikes, Katyusha rockets, howitzers and heavy weapons. (Photo by Feriq Ferec/Anadolu Agency/Getty Images)

An F/A-18C Hornet coming from Iraq lands on the flight deck of the U.S. Navy aircraft carrier USS George H.W. Bush on Sunday, Aug. 10, 2014 in the Persian Gulf. Aircrafts aboard the George H.W. Bush are flying missions over Iraq after U.S. President Barack Obama authorized airstrikes against Islamic militants and food drops for Iraqis trapped by the fighters. (AP Photo/Hasan Jamali)

An F/A-18C Hornet coming from Iraq lands on the flight deck of the U.S. Navy aircraft carrier USS George H.W. Bush, Sunday, Aug. 10, 2014 in the Persian Gulf. Aircraft aboard the George H.W. Bush are flying missions over Iraq after U.S. President Barack Obama authorized airstrikes against Islamic militants and food drops for Iraqis trapped by the fighters. (AP Photo/Hasan Jamali)

Sailors carry a missile at sunset on the flight deck of the U.S. Navy aircraft carrier USS George H.W. Bush on Sunday, Aug. 10, 2014 in the Persian Gulf. Aircrafts aboard the George H.W. Bush are flying missions over Iraq after U.S. President Barack Obama authorized airstrikes against Islamic militants and food drops for Iraqis trapped by the fighters. (AP Photo/Hasan Jamali)

Kurdish Peshmerga fighters stand guard as smoke rises after airstrikes targeting Islamic State militants near the Khazer checkpoint outside of the city of Irbil in northern Iraq, Friday, Aug. 8, 2014. Iraqi Air Force has been carrying out strikes against the militants, and for the first time on Friday, U.S. war planes have directly targeted the extremist Islamic State group, which controls large areas of Syria and Iraq. (AP Photo/ Khalid Mohammed)

This image made from AP video shows smoke rising from airstrikes targeting Islamic State militants near the Khazer checkpoint outside of the city of Irbil in northern Iraq, Friday, Aug. 8, 2014. The Iraqi Air Force has been carrying out strikes against the militants, and for the first time on Friday, U.S. war planes have directly targeted the extremist Islamic State group, which controls large areas of Syria and Iraq.(AP Photo via AP video)

An alleged ISIS militant calling himself 'the Palestinian Slayer'

This photo provided Friday, Sept.19, 2014 by the French Army's video and photo department ECPAD shows a Rafale jet fighter landing in Al Dhafra base, UAE, after a strike in Iraq Friday. Joining U.S. forces acting in Iraqi skies, France conducted its first airstrikes Friday against the militant Islamic State group, destroying a logistics depot that it controlled, Iraqi and French officials said. Rafale fighter jets accompanied by support planes struck the depot in northern Iraq on Friday morning, and the depot, which helped the extremist group launch operations, was âentirely destroyed,â President Francois Hollande said. This Rafale jet did not drop its amunition. (AP Photo/Jean-Luc Brunet, ECPAD)

This remote camera screen grab photo provided Friday, Sept.19, 2014 by the French Army's video and photo department ECPAD shows two Rafale jet fighters fly over Iraq Friday. Joining U.S. forces acting in Iraqi skies, France conducted its first airstrikes Friday against the militant Islamic State group, destroying a logistics depot that it controlled, Iraqi and French officials said. Rafale fighter jets accompanied by support planes struck the depot in northern Iraq on Friday morning, and the depot, which helped the extremist group launch operations, was âentirely destroyed,â President Francois Hollande said. (AP Photo/ECPAD)

This remote camera screen grabs provided Friday, Sept.19, 2014 by the French Army's video and photo department ECPAD shows a Rafale jet fighter, partially seen at right, and a pilot fly over Iraq Friday. Joining U.S. forces acting in Iraqi skies, France conducted its first airstrikes Friday against the militant Islamic State group, destroying a logistics depot that it controlled, Iraqi and French officials said. Rafale fighter jets accompanied by support planes struck the depot in northern Iraq on Friday morning, and the depot, which helped the extremist group launch operations, was âentirely destroyed,â President Francois Hollande said. (AP Photo/ECPAD)

FILE - This undated file image posted on a militant website on Tuesday, Jan. 14, 2014 shows fighters from the al-Qaida linked Islamic State of Iraq and the Levant (ISIL) patrolling in Raqqa, Syria. The ISIL led by Abu Bakr al-Baghdadi, who is believed to have been operating from inside Syria in recent months, is the main driver of destabilizing violence in Iraq and until recently was the main al-Qaida affiliate there. Al-Qaidaâs general command formally disavowed the group this week, saying it "is not responsible for its actions." (AP Photo/militant website, File)

In this image taken from video obtained from the Shaam News Network, which has been authenticated based on its contents and other AP reporting, a government soldier bombs neighborhoods near the al-Maza airport, in Damascus countryside, Syria, on Monday, Nov. 4, 2013. (AP Photo/Shaam News Network via AP video)

Druze men stand in the Israeli-annexed Golan Heights as they look at smoke rising in the distance caused by fighting between forces loyal to Syrian President Bashar Assad and rebels over the control of the Quneitra border crossing, on August 27, 2014. Syrian rebels, including Al-Qaeda's affiliate Al-Nusra Front, seized control of the Syrian crossing with the Israeli-occupied Golan Heights today, the Britain-based Syrian Observatory for Human Rights said. AFP PHOTO / JACK GUEZ (Photo credit should read JACK GUEZ/AFP/Getty Images)

This undated image posted on Wednesday, Aug. 27, 2014 by the Raqqa Media Center of the Islamic State group, a Syrian opposition group, which has been verified and is consistent with other AP reporting, shows fighters of the Islamic State waving the group's flag from a damaged display of a government fighter jet following the battle for the Tabqa air base, in Raqqa, Syria. A U.N. commission on Wednesday accused the extremist Islamic State organization of committing crimes against humanity with attacks on civilians, as pictures emerged of the extremists' bloody takeover of a Syrian military air base that added to the international organizationâs claims. (AP Photo/ Raqqa Media Center of the Islamic State group)

Members of United Nations Disengagement Observer Force Zone (UNDOF) use binoculars to watch smoke rising in the distance caused by fighting between forces loyal to Syrian President Bashar Assad and rebels over the control of the Quneitra border crossing, on August 27, 2014. Syrian rebels, including Al-Qaeda's affiliate Al-Nusra Front, seized control of the Syrian crossing with the Israeli-occupied Golan Heights today, the Britain-based Syrian Observatory for Human Rights said. AFP PHOTO / JACK GUEZ (Photo credit should read JACK GUEZ/AFP/Getty Images)

This undated image posted Wednesday, Aug. 27, 2014 by the Raqqa Media Center of the Islamic State group, a Syrian opposition group, which has been verified and is consistent with other AP reporting, shows fighters from the Islamic State group that captured the Tabqa air base from the Syrian government on Sunday, firing a captured tank, in Raqqa, Syria. A U.N. commission on Wednesday accused the extremist Islamic State organization of committing crimes against humanity with attacks on civilians, as pictures emerged of the extremists' bloody takeover of a Syrian military air base that added to the international organizationâs claims. (AP Photo/ Raqqa Media Center of the Islamic State group)

Kurdish Peshmerga fighters hold a position on the front line in the Gwer district, 40 kilometres south of Arbil, the capital of the Kurdish autonomous region in northern Iraq, on September 18, 2014. France said that it will follow the United States in launching air strikes against the Islamic State group in Iraq, as the jihadists posted their latest video of a Western hostage. AFP PHOTO / SAFIN HAMED (Photo credit should read SAFIN HAMED/AFP/Getty Images)

A rebel fightercarries homemade mortar rounds on September 3, 2013 in the northern Syrian city of Raqqa. UN leader Ban Ki-moon said on September 3, 2013 that a military strike on Syria over the use of chemical weapons could worsen the country's conflict. AFP PHOTO / MEZAR MATAR (Photo credit should read MEZAR MATAR/AFP/Getty Images)

This undated image posted by the Raqqa Media Center, a Syrian opposition group, on Monday, June 30, 2014, which has been verified and is consistent with other AP reporting, shows fighters from the al-Qaida linked Islamic State of Iraq and the Levant (ISIL) during a parade with a missile in Raqqa, Syria. Militants from an al-Qaida splinter group held a military parade in their stronghold in northeastern Syria, displaying U.S.-made Humvees, heavy machine guns, and missiles captured from the Iraqi army for the first time since taking over large parts of the Iraq-Syria border. (AP Photo/Raqqa Media Center)

A Muslim woman releases a dove as a symbol of peace during a rally against the Islamic State group, in Jakarta, Indonesia, Friday, Sept. 5, 2014. The banner reads: "ISIS is not Islam's voice. Stop Killing journalist." (AP Photo/Tatan Syuflana)

British Prime Minister David Cameron leaves 10 Downing Street in central London on 3, September 2014, after chairing an emergency meeting following the execution of a second US journalist by Islamist fighters in Iraq and the threat that a British hostage will be next. In a video showing the severed head of 31-year-old Steven Sotloff, a masked militant warned a British man, widely identified as David Cawthorne Haines, would be killed in response to US air strikes against militants in northern Iraq. AFP PHOTO / JUSTIN TALLIS (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)

U.S. President Barack Obama speaks during a televised address at the White House in Washington, D.C., U.S., on Wednesday, Sept. 10, 2014. Obama pledged a relentless campaign to destroy Islamic State extremists in Iraq and Syria, with Middle Eastern allies such as Saudi Arabia and Jordan playing crucial supporting roles. Photographer: Saul Loeb/Pool via Bloomberg

U.S. President Barack Obama leaves after speaking during a televised address at the White House in Washington, D.C., U.S., on Wednesday, Sept. 10, 2014. Obama pledged a relentless campaign to destroy Islamic State extremists in Iraq and Syria, with Middle Eastern allies such as Saudi Arabia and Jordan playing crucial supporting roles. Photographer: Saul Loeb/Pool via Bloomberg

This Thursday, Sept. 4, 2014, the mother of a missing Lebanese soldier who was kidnapped by Islamic State militants, shouts slogans against the Lebanese cabinet during a demonstration to demand action to secure the captives' release, in front the Lebanese government building, in downtown Beirut, Lebanon. The mother of Lebanese soldier Abbas Medlej, held captive by the militant Islamic State group says that photographs posted online purporting to show his beheading appear real, on Saturday, Sept. 6, 2014. Militants, including from the Islamic State extremist group, seized around 30 soldiers and policemen after overrunning a Lebanese border town in early August. (AP Photo/Hussein Malla, File)

This Thursday, Sept. 4, 2014, a family of a missing Lebanese soldier who was kidnapped by Islamic State militants, sits on the ground as they block a street during a demonstration to demand action to secure the captives' release, in front the Lebanese government building, in downtown Beirut, Lebanon. The mother of Lebanese soldier Abbas Medlej, held captive by the militant Islamic State group says that photographs posted online purporting to show his beheading appear real, on Saturday, Sept. 6, 2014. Militants, including from the Islamic State extremist group, seized around 30 soldiers and policemen after overrunning a Lebanese border town in early August. (AP Photo/Hussein Malla, File)

Families of missing soldiers who were kidnapped by Islamic State militants and the Al-Nusra front, sit on the ground street as they hold Arabic banners that read: "you should be ashamed of the blood of the hero martyr Ali Sayid (the beheaded Lebanese soldier)," left, "Hey politicians the blood of our sons is in your hands," center, and "If your children were among those kidnapped ... what would you have done?" right, during a demonstration to demand action to secure the captives' release, in front the Lebanese government building, in downtown Beirut, Lebanon, on Thursday Sept. 4, 2014. Lebanon's government is forming a crisis committee to handle the case of some two dozen members of the security forces held captive by Syrian militants amid escalating criticism over its response to the hostage affair. Militants, including from the Islamic State extremist group, seized around 30 soldiers and policemen after overrunning a Lebanese border town in early August. (AP Photo/Hussein Malla)

Students and supporters take part in a candle light vigil at the University of Central Florida, Wednesday, Sept. 3, 2014, in Orlando, Fla., to honor Steven Sotloff, the second American journalist to be beheaded by the Islamic State group in two weeks. Sotloff attended University of Central Florida between 2002 and 2004. (AP Photo/John Raoux)

Diane and John Foley talk to reporters after speaking with U.S. President Barack Obama Wednesday, Aug. 20, 2014 outside their home in Rochester, N.H. Their son, James Foley was abducted in November 2012 while covering the Syrian conflict. Islamic militants posted a video showing his murder on Tuesday and said they killed him because the U.S. had launched airstrikes in northern Iraq. (AP Photo/Jim Cole)

Julian Lang, left, and Andrea Henriquez join students and supporters in a candle light vigil at the University of Central Florida, Wednesday, Sept. 3, 2014, in Orlando, Fla., to honor Steven Sotloff, the second American journalist to be beheaded by the Islamic State group in two weeks. Sotloff attended University of Central Florida between 2002 and 2004. (AP Photo/John Raoux)

This undated image posted on Wednesday, Aug. 27, 2014 by the Raqqa Media Center of the Islamic State group, a Syrian opposition group, which has been verified and is consistent with other AP reporting, shows a fighter of the Islamic State group waving their flag from inside a captured government fighter jet following the battle for the Tabqa air base, in Raqqa, Syria on Sunday. A U.N. commission on Wednesday accused the extremist Islamic State organization of committing crimes against humanity with attacks on civilians, as pictures emerged of the extremists' bloody takeover of a Syrian military air base that added to the international organizationâs claims. (AP Photo/ Raqqa Media Center of the Islamic State group)

French President Francois Hollande holds a press conference with Madagascar president (unseen) at the Elysee presidential palace in Paris on September 19, 2014. Earlier today, Hollande made a statement on France's first air strike in Iraq. French jets carried out their first air strike against Islamic State militants in Iraq, successfully destroying their target, Hollande announced, vowing that more operations would follow. Hollande himself visited Iraq late last week -- the most high-profile leader to do so since jihadists stormed across the country -- and Paris hosted an international conference on the crisis last Monday.
AFP PHOTO FRED DUFOUR (Photo credit should read FRED DUFOUR/AFP/Getty Images)

This image made from video taken on Sunday, Aug. 3, 2014 shows Iraqis people from the Yazidi community arriving in Irbil in northern Iraq after Islamic militants attacked the towns of Sinjar and Zunmar. Around 40 thousand people crossed the bridge of Shela in Fishkhabur into the Northern Kurdish Region of Iraq, after being given an ultimatum by Islamic militants to either convert to Islam, pay a security tax, leave their homes, or die. (AP Photo via AP video)

Displaced Iraqi families from the Yazidi community cross the Iraqi-Syrian border at the Fishkhabur crossing to safety, in northern Iraq, on August 13, 2014. At least 20,000 civilians, most of whom are from the Yazidi community, who had been besieged by jihadists on a mountain in northern Iraq have safely escaped to Syria and been escorted by Kurdish forces back into Iraq, officials said. The breakthrough coincided with US air raids on Islamic State fighters in the Sinjar area of northwestern Iraq on August 9, and Kurdish forces from Iraq, Syria and Turkey working together to break the siege of Mount Sinjar and rescue the displaced AFP PHOTO/AHMAD AL-RUBAYE (Photo credit should read AHMAD AL-RUBAYE/AFP/Getty Images)

Peshmerga forces hand out water bottles and show the way to displaced Iraqi families from the Yazidi community as they cross the Iraqi-Syrian border at the Fishkhabur crossing, in northern Iraq, on August 11, 2014. At least 20,000 civilians, most of whom are from the Yazidi community, who had been besieged by jihadists on a mountain in northern Iraq have safely escaped to Syria and been escorted by Kurdish forces back into Iraq, officials said. The breakthrough coincided with US air raids on Islamic State fighters in the Sinjar area of northwestern Iraq on August 9, and Kurdish forces from Iraq, Syria and Turkey working together to break the siege of Mount Sinjar and rescue the displaced. AFP PHOTO/AHMAD AL-RUBAYE (Photo credit should read AHMAD AL-RUBAYE/AFP/Getty Images)

SANLIURFA, TURKEY - SEPTEMBER 22: Syrians, fleeing from clashes between the Islamic State of Iraq and Levant (ISIL) militants and Democratic Union Party (PYD) forces in the Tal Abyad district of Syria's Ar-Raqqah Governorate, passing through Turkish border gate on September 22, 2014 in Suruc district of Sanliurfa province of Turkey. (Photo by Orhan Cicek/Anadolu Agency/Getty Images)

A Turkish soldier throws a teargas canister towards Kurdish demonstrators, during clashes, as thousands of Syrian refugees continue to arrive at the border in Suruc, Turkey, Monday, Sept. 22, 2014. Some 130,000 Syrian refugees fleeing the advance of Islamic State militants have crossed the border into Turkey in the past four days, Turkey's deputy prime minister said Monday, warning that the number could rise further as the militants continue their onslaught. (AP Photo/Burhan Ozbilici)

In this Tuesday, Sept. 23, 2014 photo released by the U.S. Air Force, a U.S. Navy F-18E Super Hornet receives fuel from a KC-135 Stratotanker over northern Iraq after conducting airstrikes in Syria as part of U.S. led coalition airstrikes on the Islamic State group and other targets in Syria. U.S.-led airstrikes targeted Syrian oil installations held by the militant Islamic State group overnight and early Thursday, Sept. 25, 2014, killing nearly 20 people as the militants released dozens of detainees in their de facto capital, fearing further raids, activists said. (AP Photo/U.S. Air Force, Staff Sgt. Shawn Nickel)

In this Tuesday, Sept. 23, 2014 photo released by the U.S. Air Force, a formation of U.S. Navy F-18E Super Hornets leaves after receiving fuel from a KC-135 Stratotanker over northern Iraq as part of U.S. led coalition airstrikes on the Islamic State group and other targets in Syria. U.S.-led airstrikes targeted Syrian oil installations held by the militant Islamic State group overnight and early Thursday, Sept. 25, 2014, killing nearly 20 people as the militants released dozens of detainees in their de facto capital, fearing further raids, activists said. (AP Photo/U.S. Air Force, Staff Sgt. Shawn Nickel)

In this framegrabbed image provided by the U.S. Department of Defense shows airstrike footage on the Jeribe West Refinery in Syria Wednesday Sept. 24, 2014. The strikes aimed to knock out one of the militants' main revenue streams _ black market oil sales that the U.S. says earn up to $2 million a day for the group. (AP Photo/Department of Defense)

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BEIRUT (AP) -- The Islamic State group launched an attack Saturday on the Syrian border town of Kobani from Turkey, a Kurdish official and activists said, although Turkey denied that the fighters had used its territory for the raid.

The assault began when a suicide bomber driving an armored vehicle detonated his explosives on the border crossing between Kobani and Turkey, said the Britain-based Syrian Observatory for Human Rights and Nawaf Khalil, a spokesman for Syria's powerful Kurdish Democratic Union Party.

The Islamic State group "used to attack the town from three sides," Khalil said. "Today, they are attacking from four sides."

Turkey, while previously backing the Syrian rebels fighting to topple President Bashar Assad in that country's civil war, has been hesitant to aid them in Kobani because it fears that could stoke Kurdish ambitions for an independent state.

A Turkish government statement on Saturday confirmed that one of the suicide attacks involved a bomb-loaded vehicle that detonated on the Syrian side of the border. But it denied that the vehicle had crossed into Kobani through Turkey, which would be a first for the extremist fighters.

"Claims that the vehicle reached the border gate by crossing through Turkish soil are a lie," read the statement released from the government press office at the border town of Suruc. "Contrary to certain claims, no Turkish official has made any statement claiming that the bomb-loaded vehicle had crossed in from Turkey."

"The security forces who are on alert in the border region have ... taken all necessary measures," the statement continued.

Associated Press journalists saw thick black smoke rise over Kobani during the attack. The sound of heavy gunfire echoed through the surrounding hills as armored vehicles took up positions on the border. The Observatory said heavy fighting also took place southwest of the town where the Islamic State group brought in tanks to reinforce their fighters.

Mustafa Bali, a Kobani-based activist, said by telephone that Islamic State group fighters have taken positions in the grain silos on the Turkish side of the border and from there are launching attacks toward the border crossing point. He added that the U.S.-led coalition launched an airstrike Saturday morning on the eastern side of the town.

"It is now clear that Turkey is openly cooperating with Daesh," Bali said, using the Arabic acronym for the Islamic State.

The Islamic State group began its Kobani offensive in mid-September, capturing parts of the town as well as dozens of nearby villages. The town later became the focus of airstrikes by the U.S.-led coalition against the militants.

Kurdish fighters slowly have been advancing in Kobani since late October, when dozens of well-armed Iraqi peshmerga fighters joined fellow Syrian Kurds in the battles. The fighting has killed hundreds of fighters on both sides over the past two months.

The Observatory said Saturday the latest fighting killed at least eight Kurdish fighters and 17 jihadis.

The Islamic State group has declared a self-styled Islamic caliphate in areas under its control in Iraq and Syria, governing it according to its violent interpretation of Shariah law. The group has carried out mass killings targeting government security forces, ethnic minorities and others against it.